Int. J. Environ. Res. Public Health 2013, 10, 913-935; doi:10.3390/ijerph10030913
International Journal of
Environmental Research and
What are the Benefits of Interacting with Nature?
Lucy E. Keniger 1,*, Kevin J. Gaston 2, Katherine N. Irvine 3 and Richard A. Fuller 1
1 School of Biological Sciences, University of Queensland, Brisbane, Queensland 4072, Australia;
2 Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9EZ, UK;
3 Institute of Energy and Sustainable Development, De Montfort University, The Gateway, Leicester
LE1 9BH, UK; E-Mail: email@example.com or firstname.lastname@example.org
* Author to whom correspondence should be addressed; E-Mail: email@example.com.
Received: 5 December 2012; in revised form: 6 February 2013 / Accepted: 26 February 2013 /
Published: 6 March 2013
Abstract: There is mounting empirical evidence that interacting with nature delivers
measurable benefits to people. Reviews of this topic have generally focused on a specific
type of benefit, been limited to a single discipline, or covered the benefits delivered from a
particular type of interaction. Here we construct novel typologies of the settings,
interactions and potential benefits of people-nature experiences, and use these to organise
an assessment of the benefits of interacting with nature. We discover that evidence for the
benefits of interacting with nature is geographically biased towards high latitudes and
Western societies, potentially contributing to a focus on certain types of settings and
benefits. Social scientists have been the most active researchers in this field. Contributions
from ecologists are few in number, perhaps hindering the identification of key ecological
features of the natural environment that deliver human benefits. Although many types of
benefits have been studied, benefits to physical health, cognitive performance and
psychological well-being have received much more attention than the social or spiritual
benefits of interacting with nature, despite the potential for important consequences arising
from the latter. The evidence for most benefits is correlational, and although there are
several experimental studies, little as yet is known about the mechanisms that are important
for delivering these benefits. For example, we do not know which characteristics of natural
settings (e.g., biodiversity, level of disturbance, proximity, accessibility) are most
important for triggering a beneficial interaction, and how these characteristics vary in
Int. J. Environ. Res. Public Health 2013, 10 914
importance among cultures, geographic regions and socio-economic groups. These are key
directions for future research if we are to design landscapes that promote high quality
interactions between people and nature in a rapidly urbanising world.
Keywords: urbanisation; ecosystem services; health benefits
Throughout history, humans have had an intimate relationship with nature, most obviously
depending on it for subsistence and production. As modern society emerged, and the human population
condensed into urban areas, industrialisation freed many people from reliance on direct consumptive
interactions with nature. Indeed, in post-war society, people-nature interactions have fundamentally
shifted from direct consumption and exploitation to more mutualistic relationships in which people
actively seek out interactions with nature for recreation and enjoyment [1,2]. Interacting with nature
may therefore be important not only for survival, but also for human quality of life [3–5]. Indeed, there
is mounting empirical evidence that interacting with nature delivers a range of measurable human
benefits [6–8], including positive effects on physical health [9–11], psychological well-being [12–14],
cognitive ability  and social cohesion . Reviews on this topic have been published in the past,
but these have generally focused on a specific type of benefit, e.g., , have been limited to a
single discipline, e.g., [18–20], or have covered the benefits arising from a particular type of
interaction, e.g., [21–23].
Understanding the benefits of interacting with nature is important for maintaining and improving
human well-being in a rapidly urbanising world. For example, evidence that living in close proximity
to green spaces delivers health benefits  could be used to design landscapes with broader societal
benefits such as reductions in health spending  or crime rates . However, without a clear view
of the quality of evidence, and information on any potential thematic or geographic bias in the
available information, it is difficult to come to clear conclusions about which particular features of the
environment, including their ecological characteristics, might deliver these benefits.
Our review focuses on three critical questions. First, we explore the geographic distribution of
studies into the benefits of interacting with nature. This is an important issue, not least because the
amount and type of nature that can be experienced varies enormously across the World. For example,
the tropics are much more biodiverse than higher latitudes  and the extent to which natural
landscapes have been cleared for human use also shows a strong spatial pattern . Important
changes in the type of biodiversity present accompany the increase in biodiversity toward the tropics.
For example, bites from venomous snakes show a very strong bias toward equatorial regions , and
zoonotic diseases are similarly geographically biased , suggesting that some of the more important
negative aspects of interacting with nature might be overlooked if the research is biased toward high
latitudes. Bias in the location of studies could also lead to skewed representation of different human
Second, we examine the types of benefits studied to understand whether some have received more
focus than others. For example, the growing availability of databases of health status or interventions
Int. J. Environ. Res. Public Health 2013, 10 915
and detailed land maps has facilitated correlational investigation of access to green space with health
outcomes such as morbidity, e.g., [10,24]. In contrast, less tangible benefits such as spiritual
well-being or social cohesion may be more challenging to study.
Third, we review in some detail the basis for the evidence surrounding each of the identified
benefits of people-nature interactions. For a benefit to happen, a setting in which nature can be
experienced must exist, and an interaction between humans and nature must occur. However, we are
aware of no published typologies of these settings, and few that detail the interactions [7,23,32] or
benefits [7,33], which hinders a synthesis of the research into the benefits of experiencing nature.
Before going on to address the three questions outlined above, we first build typologies of: (i) the
settings in which people-nature interactions can occur, (ii) the types of interactions that occur between
people and nature, and (iii) the benefits that can arise from these interactions.
2.1. Selection of Articles for Review
We took a broadly qualitative approach to our review, rather than conducting a formal meta-
analysis. Our survey of the literature indicated that much of it is not amenable to quantitative meta-
analysis, and that such an approach would necessitate filtering out all but a small proportion of studies.
We restricted our search to primary research articles in the peer-reviewed scientific literature,
identifying articles relevant to this review through standardised search methods including electronic
database searches (Web of Science, Google Scholar) and opportunistic searches through relevant
reference lists. Search terms were combinations of “nature”, “interaction”, “benefit”, “health” and
“biodiversity”. Studies were included if they presented findings about one or more benefits of
interacting with nature in some form. Studies were excluded if they reported the benefits of nature for
humans but did not focus on a specific interaction at an individual level, given that our focus was on
interactions. For example, a study reporting on the economic and environmental benefits of
biodiversity  was excluded because it did not directly investigate a specific interaction between
people and nature. Only studies published in peer-reviewed scientific journals were included, and our
search was conducted in June 2011. The search yielded 57 papers for review.
2.2. Typology of Settings
We categorised the settings in which the reviewed research had been done into six types, loosely
arranged in increasing order of naturalness of the environment. These settings ranged from indoor
spaces, through outdoor local to broad regional landscapes (Table 1). Indoor settings were either
private (e.g., within a home) or in a public building such as a hospital, office or classroom. The natural
elements present in these settings were typically indoor plants, pictures of nature, or window views of
nature. Urban outdoor settings were characterised by a high density of houses, traffic and people, but
include some green spaces and natural elements such as public and private parks, gardens, landscaping
and street trees. These settings differed from those on the urban fringe, where housing density tends to
be lower and large natural areas such as forest reserves are more prevalent. Production landscapes
were intensively managed for agriculture, characterised by open spaces, large areas of vegetation and
Int. J. Environ. Res. Public Health 2013, 10 916
broad landscapes with few buildings and little traffic. Wilderness settings were largely undisturbed by
people and generally remote from dense urban centres; apart from the few people residing in such
landscapes, specific trips to experience them would normally be necessary. We also included a
species-specific setting because some of the reviewed papers identified benefits associated with
interacting with a specific species, regardless of where that interaction occurred.
Table 1. Typology of settings in which interactions between people and nature occur.
Inside a building
Foliage plants [35,36]
Landscape dominated by built form
Public green space 
Private green space e.g., garden 
Roadside trees or isolated urban
The area immediately surrounding a town or city
Peri-urban nature reserve 
Agricultural lands (pastoral or cropping)
Area where human influence is low
National Parks [48–50]
Cases where object of the interaction is defined
with no particular setting
Marine animals [41,51]
Domesticated pets 
2.3. Typology of Interactions
Three main types of interaction were evident from a review of the selected literature: indirect,
incidental and intentional (Table 2). Indirect interactions do not require a person to be physically
present in nature, and can include such activities as viewing an image or motion picture of nature, or
having a view of nature through a window. Incidental interactions occur when a person is physically
present in nature, but where the interaction is an unintended result of another activity, such as
encountering vegetation whilst cycling to work. Incidental interactions differ from indirect interactions
in that nature, or natural elements, must be physically present. For example, viewing a picture of a
plant inside an office building is an indirect interaction, whereas encountering the plant is an incidental
interaction because the plant is physically present in the same space as the person. Intentional
interactions are those in which the participant has intent to interact with nature, such as viewing
wildlife, gardening or hiking in a national park. Note that in some special cases where a window is
used to conceal a wildlife-watcher, viewing nature through a window can be thought of as an
intentional interaction, e.g., watching a bird feeder that has been set up in a backyard or viewing
wildlife from a specially designed hide. Researchers have previously thought about interactions as a
continuum ranging from passive to active [7,8,23], and while very useful, such schemes do not account
for the personal intent behind an interaction. This is an important distinction because it seems likely
Int. J. Environ. Res. Public Health 2013, 10 917
that only a certain proportion of a population will engage intentionally with nature [53,54], and it has been
argued that the intent to interact may be critical in efforts to promote sustainable behaviours [55,56].
Table 2. Typology of interactions between people and nature.
Experiencing nature while not being
physically present in it
Viewing nature in a picture, image, motion picture or through
a window [13,57]
Experiencing nature as a by-product of
Encountering nature incidental to another activity, e.g.,
walking to work or driving 
Encountering vegetation indoors 
Experiencing or being in nature through
Recreation, e.g., hiking, camping, wildlife viewing, adventure
Gardening or farming 
Conservation volunteering 
2.4. Typology of Benefits
An enormous range of benefits from interacting with nature has been studied in the reviewed
literature. These span from physical health and cognitive benefits to spiritual benefits and the tangible
outcomes associated with food production and wealth (Table 3). While we do not focus on the negative
aspects of interacting with nature, we recognise their importance for understanding the full scope of
the people-nature relationship [29,30,59].
Table 3. Typology of the benefits of interacting with nature.
Positive effect on
Increased self-esteem [32,60,61]
Improved mood [58,32]
Reduced anger/frustration 
Psychological well-being [13,63,64]
Reduced anxiety 
Improved behaviour 
Positive effect on
cognitive ability or
Attentional restoration [12,14,46,66,67]
Reduced mental fatigue 
Improved academic performance 
Education/learning opportunities [49,55]
Improved ability to perform tasks 
Improved cognitive function in children 
Improved productivity [35,68]
Positive effect on
and/or physical health
Stress reduction [37,70,71]
Reduced blood pressure [45,32]
Reduced cortisol levels 
Reduced headaches 
Reduced mortality rates from circulatory disease 
Faster healing 
Addiction recovery 
Perceived health/well-being 
Reduced cardiovascular, respiratory disease and long-term illness 
Reduced occurrence of illness [15,35]
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Table 3. Cont.
Positive social effect at an individual,
community or national scale
Facilitated social interaction [72,73]
Enables social empowerment [62,74]
Reduced crime rates 
Reduced violence 
Enables interracial interaction 
Social cohesion 
Social support 
Positive effect on individual religious
pursuits or spiritual well being
Increased inspiration 
Increased spiritual well-being [41,47]
Material goods that an individual can
accrue for wealth or possession
Food supply 
3. Results and Discussion
3.1. Geographical Bias
The 57 studies were heavily biased toward high latitudes, in particular North America and Europe,
with 79% of papers reporting results from these regions (Figure 1). Asia and Australasia were less well
represented, and no studies were located in South America or Africa. This bias towards Western,
developed nations may be affecting the intensity with which different types of benefits have been
studied to date, in part because the distribution of biodiversity is strongly spatially structured, and
because cultural and socio-economic differences between regions may influence responses to
interactions with nature [30,31,76]. The bias away from heavily biodiverse tropical regions might also
result in a heavy focus on the benefits and not the problems provided by nature (e.g., disease vectors,
Figure 1. Number of studies undertaken in each continent (n = 59). Where a study
investigated more than geographical location, each location is separately included.
Number of papers
Int. J. Environ. Res. Public Health 2013, 10 919
3.2. Disciplinary Representation in Nature-Interaction Benefits Research
The reviewed studies were published in journals from a broad range of research disciplines (Figure 2).
Social science was the most represented discipline; health and environmental sciences were much less
heavily represented and only one of the reviewed studies was published from the biological sciences.
This bias towards the social sciences and clear deficiency of input from the biological sciences may be
constraining understanding of the beneficial interactions between people and nature. Without
collaboration from biologists and ecologists, it will be difficult to evaluate the importance of
biodiversity and ecological quality of natural environments as mechanisms behind these beneficial
Figure 2. Number of studies undertaken in each research discipline (n = 57). The research
discipline for each of the reviewed papers was defined using the classification system
employed by the Australian Research Council (2010).
3.3. Strength of Evidence for the Benefits of Interacting with Nature
The majority of studies (Figure 3) focused on psychological benefits, which can broadly be divided
into psychological well-being benefits and those associated with cognitive performance. Interaction
with nature can increase self-esteem and mood [32,38,62], reduce anger , and improve general
psychological well-being with positive effects on emotions and behavior [13,64]. These interactions
can also have positive effects on cognitive function such as academic performance  and the ability
to perform mentally challenging tasks . Additionally, this review suggests that interactions with
nature may have physical health benefits such as stress reduction [35,70,71] or reduced mortality rates 
as well as social, including facilitating social interaction [16,72] or reducing crime and violence in
urban areas [25,63]. Only a small number of studies focused on spiritual or tangible benefits (Figure 3).
We now turn to an evaluation of the strength of evidence supporting each of the major benefits of
interacting with nature.
Number of papers
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Figure 3. Number of studies that have investigated each type of benefit (n = 82). Where a
study investigated more than one benefit, each is separately included.
3.3.1. Psychological Well-Being Benefits
Several of the reviewed studies have focused on psychological well-being effects arising from
exercising in a natural environment. In a study investigating the effects of green exercise initiatives in
the UK, Pretty et al.  found that participants’ mood and self-esteem, as measured by self-report
surveys, were significantly improved after exercise. The authors interpreted this as evidence that
exercise in natural environments can improve psychological well-being, although a control treatment
with exercise in a non-natural setting was not included, and so it is not clear whether the natural
environment itself was contributing to the effect, or whether exercise alone is sufficient. However, in a
separate but topically related study, Pretty et al.  compared the emotional responses of participants
exposed to a sequence of natural and urban landscape images whilst running on a treadmill in a
laboratory. Mood and self-esteem both improved with exposure to natural scenes, suggesting that
exercise may deliver greater benefits when it occurs in the presence of nature.
Despite the results of these studies, several papers report little or no relationship between the setting
in which exercise takes place and psychological well-being benefit. A study in Japan monitored
emotional change after exercise in a laboratory and in the green space around a university campus .
Positive emotions were found to be significantly higher after exercise, regardless of the running
environment . In a related study comparing the effects of exercise in a park and an urban setting in
Sweden, Bodin and Hartig  found that anxiety, depression and anger, measured using self-report
questionnaires, were significantly reduced after running, but there was no significant difference
between the running environments. Consequently, we cannot yet conclude definitively that a natural
setting increases the psychological well-being benefits of exercise.
Number of papers
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Intentional interactions with nature such as gardening [64,70] and watching wildlife  also
promote psychological well-being. Similarly, interacting with nature may have specific psychological
well-being benefits for children. In a study on children’s mental and social health, Maller  found
that direct contact with nature, as facilitated by curriculum-based nature activities in schools, had a
positive impact on self-esteem and mental-well-being. These studies rely primarily on data derived
from the perceptions of parents and teachers; experimental research designs that that utilize objective
assessments of the psychological well-being effects of interacting with nature on children in a series of
controlled environments may be useful for further investigating these effects. Despite the limitations of
the reviewed studies, it is clear that interacting with nature may deliver several positive psychological
well-being benefits to children.
In addition, there is emerging evidence that childhood interactions with nature may influence
attitudes towards nature in later life . While this is not necessarily a benefit per se, there is much
interest from a sustainability perspective in how attitudes and behaviours that are positive toward
nature develop [56,80,81]. A nationwide survey of US adults currently living in urban areas found that
growing up in natural environments, or participating in activities such as gardening, visiting parks and
taking environmental classes during childhood had a strong influence on positive environmental
attitudes in adult life . This was an important study as it highlighted the potential for long-term
effects of experiences with nature during childhood. Chawla  reviewed several studies in this area,
noting that they are limited by survey response bias, sampling bias and the lack of adequate control
groups. Long-term longitudinal studies of children living in both urban and natural settings are
necessary to determine the importance of these interactions for triggering environmentally responsible
behaviour in later life. These studies are of particular importance given that a majority of the human
population is now living within urban areas [4,83], where opportunities for people to interact and bond
with nature are greatly diminished. Children raised in nature-deficient areas may be deprived of these
early interactions with nature and may therefore be less likely to appreciate and support conservation
initiatives in adulthood . There are several validated tools available for measuring nature
appreciation, including the Connectedness to Nature Scale , the Nature Relatedness Scale  and
the New Ecological Paradigm , and, as well as being used to track the development of nature
appreciation, they can be used to test whether nature-oriented participants are more likely to derive
benefits from interactions with nature than those with less prior affinity to nature.
3.3.2. Cognitive Benefits
It has been hypothesised that natural environments are restorative, contributing to attentional
recovery  and reducing mental fatigue. Kaplan  investigated the restorative benefits of the view
from home by comparing window views in six low-rise apartment communities in Michigan (USA).
Participants completed self-report questionnaires to measure satisfaction with their neighbourhood and
well-being outcomes associated with attentional recovery and mental fatigue; participants also
indicated the natural content of the view from their apartment windows. The study found that
satisfaction and several well-being outcomes increased with the natural content in the view from home.
Natural environments vary in their complexity and species diversity and Han  found that natural
environments also differ in their restorative potential. Importantly, this suggests that general
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comparisons between natural and urban settings may be deficient because they do not factor in the
complexity of different natural environments. In a study from the UK, Fuller et al.  compared 15
urban green spaces and found that the restorative benefits to park users, as measured by self-report
ability to reflect (a dimension of Attention Restoration Theory), increased with plant species richness
in the green spaces. This highlights the importance of considering biological diversity and complexity
when investigating the benefits of interacting with nature; this study was the only reviewed paper
published from the biological sciences discipline, and the only study that specifically investigated the
benefits of interacting with biodiversity, as opposed to an often loosely defined “nature”.
Urban environments can be very stimulating, requiring directed attention and negatively impacting
cognitive function [88,89]. In urban areas, attention must be directed towards avoiding potential
hazards and coping with noise and visual stimuli. This directed attention requires effort in order to
inhibit or address these distractions and this can lead to mental fatigue, resulting in a lowered ability to
concentrate and perform cognitive tasks . There is good evidence to suggest that exposure to
nature in urban and wilderness settings can improve cognitive function and performance [46,89].
Most studies of cognitive benefits used controlled experiments to measure cognitive performance.
In a study of 38 students in Michigan (USA), Berman et al.  measured cognitive performance with
a backwards digit span task, in which participants listen to a sequence of numbers and repeat them in
reverse order. The results showed that cognitive performance was greater after students had walked
through a tree lined arboretum when compared with a busy city street. The authors interpret this
as evidence that the restorative properties of nature can improve cognitive function. Similarly,
Hartig et al.  compared wilderness and non-wilderness vacations in southern California (USA) and
found that proofreading, as a measure of cognitive performance, was significantly improved in the
wilderness vacation participants for several weeks after the vacation, whereas the other two groups
declined in proofreading performance over time. The authors conclude that a prolonged wilderness
experience has restorative effects .
The restorative benefits of nature have also been studied by investigating preferences for different
settings. In a survey of 140 Norwegian adults, Hartig et al.  found that natural environments were
generally preferred settings for restorative experiences when compared with urban settings. In an
earlier study, Herzog et al.  compared three settings ranging from urban to natural to investigate
which might promote restoration. Participants were given two scenarios to accomplish either
psychological recovery or reflection and were then shown a series of slides of natural,
sport/entertainment and urban settings which they had to rank to determine the suitability of the
location in achieving the scenario goal. Natural settings showed uniformly high restorative potential in
comparison with less natural settings.
Studies have used self-report questionnaires and interviews with parents, guardians and teachers to
gauge the effects of nature on children’s psychological well-being [62,91]. A study of children
diagnosed with Attention Deficit Disorder (ADD) in the US tested whether indirect interactions with
nature, such as exposure to nature during play, were related to attentional function . Parents and
carers of 96 children with ADD completed a questionnaire about the child’s attentional functioning
after participating in leisure activities. Mean post-activity attentional functioning ratings were
significantly higher for green outdoor activities as opposed to those in other settings, and the severity
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of ADD symptoms was significantly lower after playing in natural areas outdoors. It is unclear whether
these psychological benefits are specific to children with ADD or applicable generally to all children.
Three studies tested for the cognitive benefits of indirect interactions with nature such as
viewing images  and incidental interactions such as encountering indoor foliage vegetation .
Berman et al.  found that the cognitive performance of students, as measured by three directed
attention tasks, was significantly improved after viewing pictures of natural scenes rather than urban
areas. A study in Japan found that indoor foliage vegetation had a similar beneficial effect on cognitive
performance, but only for male participants . The female participants showed higher task
performance than the males, but the presence or configuration of indoor plants had no additional effect
on their cognitive performance. However, a related study showed that cognitive performance declined
with increased density of indoor plants . It is possible that indoor environments may not require as
high levels of directed attention in comparison with outdoor environments, thus the restorative
influence of nature in indoor environments may have less impact on cognitive function. Further
investigation in this area would be fruitful and future studies might usefully employ a randomised,
controlled experimental design that accounts for variables such as gender, age, plant configurations,
plant densities and species diversity.
Incidental interactions with nature may positively influence the cognitive function of children.
A longitudinal study in the United States correlated measures of vegetation around the home with
measures of cognitive function to investigate the effect of moving from substandard low-income
housing to new single family homes on 17 children . There was a significant improvement in
cognitive performance when the children moved to new homes surrounded by vegetation and natural
elements. The author interprets this as evidence that presence of nature around the home is important
for cognitive function in children . However, no experimental control group was included, and
although other possible explanatory variables (e.g., changes in housing quality) were analysed, it is
unclear whether the presence of surrounding vegetation is the key variable influencing children’s
cognitive performance, or what role other drivers such as the novelty of moving house or other features
of the surrounding neighbourhood might play. Such multi-faceted analysis is of course difficult to
achieve when one is relying on the goodwill of study participants.
In summary, the cognitive benefits of interacting with nature can be measured effectively using
individual performance-based tests that are completed after interacting with nature in different settings.
For this reason, objective and experimental research design has been employed by most studies
investigating cognitive benefits. There is robust evidence to suggest that both intentional and indirect
interactions with nature outdoors can improve cognitive function, although the evidence surrounding
indoor interactions is more equivocal. Tightly controlled experiments are necessary to improve
understanding in this area. As with psychological well-being benefits, much of the research into
cognitive performance has made broad comparisons between green spaces and urban settings, and the
specific effects of biodiversity on cognitive performance remain unknown.
3.3.3. Physiological Benefits
Urban environments contain many potential stressors such as traffic, crime, dense crowds, and
over-stimulation. There is evidence to suggest that interactions with nature may alleviate some of the
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negative physiological effects of such stressors. An experimental study in the Netherlands exposed
participants to a stress-inducing activity and then measured cortisol levels following half an hour of
either indoor reading or outdoor gardening . While both activities led to decreases in cortisol
levels, the decrease was significantly stronger for the gardeners, suggesting that gardening can relieve
the physiological effects of stress . However, because the control condition (indoor reading) is
both passive and occurred in a non-natural setting, it is difficult to determine the relative contributions
of the activity associated with gardening and the natural components of the environment in promoting
In an experimental study in China, Yamaguchi et al.  measured salivary amylase activity as a
physiological indicator of stress in healthy males before and after exercise in both a forest and an urban
environment. Enzyme activity was significantly reduced after exercise in forest environments and the
authors conclude that the physiological effects of stress are reduced in forest environments. A related
study in Switzerland found that a decrease in stress-induced headaches, as measured by self-report
surveys, was significantly related to physical activity in parks . Interestingly the effect was
consistent for park and forest environments, despite the very different biological characteristics of
Indirect interaction with nature such as a window view or a picture of nature may also reduce the
physiological effects of stress. A study in Taiwan used electromyography and electroencephalography
to test participants’ responses to photographs of office environments with different configurations of
indoor plants and natural views . Physiological condition improved when viewing a picture of an office
with a view of nature and indoor plants, suggesting a reduction in the physiological effects of stress.
Other studies of physiological benefits have investigated the relationship between nature and
healing. In a retrospective study of cholecystectomy patients in a hospital in Pennsylvania (USA),
Ulrich  found that post-operative healing, as measured by length of hospital stay, took less time for
patients in a hospital room with a window-view of nature in comparison with patients with a view of a
brick wall. Patients with a view of trees also required fewer strong painkillers, received fewer negative
evaluative comments from nurses and had fewer postsurgical complications. In another study,
Bennett et al.  discovered that an outdoor therapeutic camping trip reduced the probability of
patient relapse for recovering substance abusers.
Maas et al.  conducted a broad scale epidemiological study drawing together self-report
perceived general health from 250,782 people in the Netherlands with national land cover data. Green
space coverage within 1 km and 3 km of participants’ homes was positively related to perceived
health. A related study from the UK employed land use datasets and mortality data to examine the
gender differences in relationships between urban green space and health outcomes . Male
cardiovascular and respiratory disease mortality rates decreased with increasing green space, with no
significant relationship for women . By contrast, in an unrelated study, Ulrich  found that the
positive physiological responses of exposure to nature, as measured by heart rate and alpha amplitude
while viewing images of nature, were significantly stronger for women. Gender is clearly a factor that
should be carefully considered when designing research programs.
Studies on the effects of indoor plants in office environments have shown that their presence can
improve health  and reduce the occurrence of illness [15,35]. For example, Fjeld et al. 
assessed the effect of office foliage plants on symptoms of discomfort for 51 healthy office workers at
Int. J. Environ. Res. Public Health 2013, 10 925
a Norwegian oil company over a two-year period. Participants completed a survey with questions
relating to physical symptoms such as itchiness and coughing. The results showed that the presence of
plants in offices correlated with a reduction in dry skin, hoarse throat, coughing and fatigue, suggesting
that the introduction of foliage plants into an indoor environment may reduce symptoms of physical
discomfort and improve health. Related studies on the effects of indoor vegetation have found that the
number and presence of indoor plants in an office  and a classroom  reduce the occurrence and
frequency of time off through ill health.
Overall, research to date has identified a broad range of physiological benefits from interacting with
nature. There seems to be a good balance between experimental and correlative studies, and most have
utilised both self-report and objective data. Whilst the evidence for some of the identified benefits is
fairly strong, confounding factors such as gender and age have not always been incorporated into the
research design. Most studies of the physiological benefits of interacting with nature are descriptive,
and there is little evidence suggesting how these benefits are delivered. Despite the use of a variety of
different natural settings, little explicit consideration has been given to the importance of biodiversity
itself (rather than simply “green”) in delivering improved physical function or health.
3.3.4. Social Benefits
Some of the negative impacts of urbanisation include individual isolation, lack of social support,
interracial conflict and increased incidence of crime and violence . Our review suggests that
provision and access to green space within urban areas may ameliorate or even reverse some of these
social challenges and ultimately increase social cohesion [4,72]. Interactions with nature can facilitate
social interaction in adults and children , foster social empowerment [62,74], enhance interracial
interaction  and promote social cohesion and support . There is a significant decrease in crime
rates and violent behaviour in urban areas with surrounding green space or vegetation, in comparison
with urban areas with limited greenery [25,63].
Much of the reviewed literature for this type of benefit focused on the role of group-oriented
conservation projects (e.g., tree planting) and community gardens in delivering social capital benefits.
A study based in rural Australia discovered that residents of a community who were involved with a
land management group had a greater sense of community cohesion and were more willing to work
toward improving their community than non-participating individuals . This provides some
indication that volunteering in conservation groups might increase social capital within the wider
community, although evidence from studies of other forms of intentional nature engagement activities
suggests caution in interpretation. For example, Kingsley et al.  found that participants described
social support, connections and social networking as positive elements of participating in a community
garden. Whilst this might indicate that community gardens encourage wider social cohesion and
cooperation , the authors acknowledge that the evidence from the study does not demonstrate that
the social benefits extended beyond the garden community. Similarly, Shinew et al.  found that
inter-racial interaction among community gardeners in North America was enhanced in community
garden settings but did not extend into the wider community.
Other studies have focused on the role of urban green space and vegetation in reducing violence and
crime in urban areas. Studying 98 urban apartment buildings in the city of Chicago, Illinois (USA),
Int. J. Environ. Res. Public Health 2013, 10 926
Kuo and Sullivan  found that crime rates, as measured by police crime reports, were significantly
lower in buildings surrounded by higher vegetation density. Inclusion of confounding variables in the
analysis produced the same results; vegetation density remained a consistent predictor of crime rates.
In a related study of public housing residents in Chicago, Kuo and Sullivan  found that occurrences
of violence and aggression, as measured through self-reports from residents, were also significantly
lower in buildings with higher densities of surrounding vegetation. This study also investigated
potential mechanisms behind the identified relationship and found that aggression was correlated with
attentional function and, specifically, mental fatigue. Thus, a potential pathway is that urban vegetation
restores attentional function, which reduces the occurrence of violence and aggression in urban public
housing, indirectly contributing social benefits to the broader community. This fascinating Chicago-based
work has not—to our knowledge—been replicated in any other study system; it would be fruitful to
discover whether these results generalise to other locations, not least because there are myriad social
benefits that stem from reduced violence and crime in urban settings.
The potential social benefits of nature interactions have also been studied in other sectors of society.
Maller  conducted interviews with school principals and teachers in Melbourne, Australia to
determine the perceived social benefits for children participating in nature-based activities. The identified
benefits included empowerment and social engagement . Whilst suggestive of social benefits, the
results are based on the perceptions of the educators; development of longitudinal studies that follow
students over time would provide further useful insight into these potential benefits for children.
3.3.5. Spiritual Benefits
Research on the spiritual benefits of interacting with nature has been limited, with only three (5%)
of the reviewed studies focusing specifically on these. Benefits included increased inspiration  and
feelings of connectedness to a broader reality , both important for spiritual well-being . It has
been suggested that these types of benefits may also play an important role in positively influencing how
people value natural environments  by inspiring a broader responsibility for the natural world .
Common elements among the multiple definitions of spiritual well-being include a sense of
connectedness, a sense of purpose, a sense of awe and inspiration and faith in a larger reality [7,95,96].
These might or might not be connected to a specific religion per se; experiences of wilderness
landscapes or specific natural features where the power of nature is apparent have been shown to
invoke feelings of awe and inspiration. For example, a study of recreation programs in two separate
wilderness areas in North America used on-site observations, journal analyses and interviews to
examine wilderness experiences as a source of spiritual inspiration and well-being for women .
Participants reported on the expansiveness of landscapes and the power of nature as meaningful
aspects of their wilderness experience. The authors interpreted this as evidence of spiritual inspiration
and concluded that wilderness experiences are an opportunity for spiritual growth .
Viewing wildlife may invoke similar feelings of awe and inspiration, regardless of the environmental
setting. In a study of tourists on two separate wildlife tours—in Spain and California—analysis
of interviews and field journals revealed that viewing wildlife evoked a feeling of awe and wonder
and created a temporal experience in which all concentration was focused on the moment .
Int. J. Environ. Res. Public Health 2013, 10 927
This study suggests that wildlife-viewing events can promote a deep sense of well-being, leading to
One study investigated the occurrence of transcendent experiences in forest environments .
A transcendent experience is defined as one characterised by strong positive feelings of happiness and
freedom, a sense of union with the universe or higher entity, absorption in the moment and a sense of
timelessness . This study, undertaken in Victoria, Australia, utilized a written questionnaire to
prompt participants to recall a transcendent experience whilst in a forest environment. Participants
included people who visit, live or work in forests. Two forms of transcendent experiences occurred in
forests, one characterized by feelings of insignificance and the other by a sense of compatibility and
familiarity. The authors interpret this as evidence of the spiritual value of forests .
Given the qualitative nature of the evidence, the lack of a single definition for spiritual well-being,
small sample sizes and the limited number of studies, the evidence for spiritual benefits of nature
experiences is not conclusive. There is a cultural bias towards Western society among the reviewed
studies, despite the likelihood that the spiritual benefits of interacting with nature will vary
significantly between cultures [76,97]. Also, the evidence for spiritual benefits is thus far largely
limited to wilderness settings, which may have narrowed the range of benefits that have been studied.
For example, feeding wildlife has been found to invoke a sense of belonging or connection to and, on a
deeper level, a responsibility for the natural world . In urban areas, where large natural areas are
lacking, wildlife feeding may be an important mechanism for promoting spiritual well-being.
3.3.6. Tangible Benefits
Interactions with nature can also produce tangible benefits. While large-scale industries such as
agriculture and mining exemplify broad scale interactions that obtain tangible benefits through
resource extraction or production, this review specifically focuses on individual interactions. Examples
of these from amongst the 57 reviewed studies include food production from private domestic
gardens [38,55], the impact of access to local green spaces on house sale prices [98–100], and the
value of access to natural areas ascertained via willingness to pay for the experience .
In an early study on the benefits of gardening, a survey of gardeners in Michigan (USA) revealed
that tangible benefits such as food production were rated as more important for plot gardeners than
community or home gardeners . The study also discovered that across all these gardeners other
benefits, such as the gardening experience and sustained interest, were rated as more important than
the tangible benefits. These results hint that while food production may be a tangible benefit, it may
not be the primary motivation for gardening. In a recent study specifically focused on motivators for
gardening amongst gardeners in Ohio (USA), producing food and herbs was one of the identified
motivators for gardening but not the primary one . Some disadvantaged neighbourhoods in
developing countries largely depend on subsistence gardening as a source of food and income ,
thus cultural, regional and socio-economic differences may influence the relative importance of
deriving tangible benefits from interacting with nature through gardening.
The economic value of access to natural areas can be calculated using hedonic valuation techniques,
which estimate the influence of the natural area on the market price of another good, such as a house .
Morancho  used this technique to explain house prices in Castellon, Spain. Environmental
Int. J. Environ. Res. Public Health 2013, 10 928
variables included views of green space, distance from dwelling to nearest green space and the size of
the nearest green space. Analyses revealed an inverse relationship between house prices and distance
to nearest green space and that proximity is more important than size of the nearest green space .
Using the same hedonic technique, Bolitzer and Netusil  analysed sale price data for houses in
Portland, Oregon (USA). Proximity to green space had a positive effect on home sale prices, but these
effects were only significant for publicly accessible green spaces such as public parks or golf courses.
While agreeing with Morancho’s  findings, these results highlight that the type of urban green
space can be important in addition to its proximity. This may be because people place value on green
space they can access, suggesting that inaccessible private green space may be of less value than a
publicly available park, although further research on this potential distinction would be fruitful. In a
related study, Pearson et al.  used the hedonic pricing technique to estimate the impact of the
headland section of Noosa National Park, Australia, on land values in areas surrounding the park. In
contrast to the other studies [75,98], while views of the National park increased property value,
proximity had no significant effect . Moreover, working in Baltimore, Maryland (USA), Troy and
Grove  identified a negative effect of proximity to green space in neighbourhoods where crime rates
were above a certain threshold, suggesting that green space can be viewed as a liability in some situations.
The economic value of recreation in natural environments can also be estimated at an individual
level. In a study of three public beaches in South Carolina (USA), Oh et al.  surveyed 925 non-resident
visitors to public beaches and found that participants were willing to pay on average an extra $6.60 per
day for additional public beach access points in South Carolina. The identified willingness to pay an
increased entry fee may be indicative of the economic value that people place on the benefits of
visiting a beach.
Our review has identified a typology of three categories of nature-interaction—indirect, incidental
and intentional—as well as six key types of benefits that may be experienced from a variety of natural
settings. All of the reviewed studies were undertaken in developed countries, mostly Western societies,
and there is a clear bias in the literature with respect to cultural and socio-economic differences
between geographic regions. It is thus difficult to determine which of the reported benefits of
interacting with nature are universal, and which are culturally specific. While it has been hypothesized
that humans have an instinctive connection with nature , this connection may manifest itself
differently in different cultures owing to different value systems and attachments to natural areas.
A mix of theoretical and empirical work may well be needed to further examine this important
dimension of the benefits of interaction with nature.
The body of literature is broad and spans several disciplines although the majority has been
conducted from within the social sciences. The noticeable lack of contribution from the environmental
and biological sciences has meant that we know little about which specific ecological features of the
environment might be important for delivering a beneficial response. The sophisticated tools available
within ecology for measuring characteristics of the biological component of landscapes, such as
species richness, vegetation structure and community composition, could provide fruitful insight into
this issue. For example, what type of vegetation structure is needed, and how many species should be
Int. J. Environ. Res. Public Health 2013, 10 929
planted to maximise the well-being value of an urban green space? To remedy this, we encourage
further engagement by ecologists to investigate the extent to which the biological richness of a
landscape, as opposed to an often loosely defined “nature”, plays an important role in enhancing
Overall, there is good evidence to suggest that natural settings can have multiple beneficial effects.
It was clear from the reviewed studies that some types of benefits have been much more heavily
studied than others; psychological, cognitive and physiological benefits featured most prominently
with fewer studies of social, spiritual and tangible benefits. Given the possible wider societal benefits
from increased social cohesion  or the role that spiritual well-being might play in influencing the
way people value nature , the latter benefits deserve considered attention in future research.
When drawing conclusions from the existing literature, this review suggests caution is appropriate.
There were several general methodological limitations that recurred throughout the body of reviewed
literature. Firstly, much of the evidence has been derived from self-report questionnaires, particularly
in the studies focused on psychological and social benefits. Secondly, sampling bias may have
influenced results in some cases, especially for studies that recruited participants in situ. Thirdly, the
reviewed studies were generally conducted over relatively short time frames leaving our understanding
of the long-term benefits of interacting with nature unstudied. Lastly, many experimental studies did
not include an appropriate control group therefore confounding variables such as age, gender and
personal values may have influenced the results.
The summative insight across these studies provides important indication of the potential range of
benefits yet there remains the possibility that some or many of the widely accepted benefits of
interacting with nature are actually not causally related to nature itself. For example, while the
psychological benefits associated with exercising in natural areas have received considerable focus,
there is limited evidence to suggest that these interactions have positive psychological and
physiological effects. It is clear, though, that whilst exercising in natural environments may not deliver
psychological and physiological benefits, natural areas may be important for facilitating exercise,
particularly in urban areas. Similarly, there is strong evidence to suggest that natural settings, such as
community gardens, can be important for facilitating social contact, though it is unclear whether
collaborative activities in these natural settings can actually increase social capital in the wider community.
Interactions with nature can positively influence behaviour, academic performance and social skills
in children [62,69], something that could be reflected in school curricula (e.g., environmental
experience components) and could have broader benefits, such as reducing bullying in schools. Much
of the evidence is based on self-reported perceptions of parents and guardians, and the majority of
these studies have been undertaken over relatively short timeframes. For example, while childhood
interactions with nature may influence attitudes towards the environment in later life , which could
have positive implications for future conservation efforts, longitudinal studies will be necessary to
more fully evaluate the development of environmental values and behaviours from childhood.
Understanding the benefits of interacting with nature is also important from a sustainability
perspective. Unsustainable exploitation of natural resources has resulted in the loss and degradation of
species and ecosystems worldwide . The natural systems that have sustained human livelihoods
throughout history have been severely impacted, consequently human quality of life has been
inadvertently threatened. The solutions to the current biodiversity crisis are complex and will depend
Int. J. Environ. Res. Public Health 2013, 10 930
on broad-scale conservation efforts, effective landscape management and innovative urban planning.
Strong public support will be necessary to encourage governments to implement effective conservation
policies , and positive interactions with nature might be important for influencing an individual’s
sympathy for conservation goals . However, opportunities for these interactions are being reduced
as urbanisation increases and the majority of the human population now resides in urban areas [83,103].
Therefore, protecting and enhancing biodiversity in these urban areas could be critical for achieving
conservation objectives and maintaining human quality of life during this period of major global change.
Overall, this literature review has documented a broad range of the benefits of interacting with
nature. It has been shown that interactions with nature can deliver a range of psychological well-being,
cognitive, physiological, social, tangible and spiritual benefits and that access to green space and
natural areas is important for facilitating activities that are beneficial for human well-being. However,
because the evidence is mostly descriptive, little is known about the mechanisms that are important for
delivering these benefits and so key questions still remain. What characteristics of natural settings
(e.g., biodiversity, level of disturbance, proximity, accessibility) are important for triggering a
beneficial interaction? How do these characteristics vary in importance between different cultures,
geographic regions and socio-economic groups? These are important directions for future research if
we are to make effective, informed decisions regarding the best ways to maximise opportunities for
people to interact with nature in a rapidly urbanising world.
This work was funded by Australian Research Council Discovery Grant DP120102857 and an
Australian Research Council Future Fellowship to R.A.F. We thank Danielle Shanahan, Jasmine Lee,
Robert Bush, Julie Dean and Jessica Sushinsky for comment and discussion.
1. Fuller, R.A.; Irvine, K.N. Interactions between People and Nature in Urban Environments.
In Urban Ecology; Gaston, K.J., Ed.; Cambridge University Press: Cambridge, UK, 2010;
2. Irvine, K.N.; Fuller, R.A.; Devine-Wright, P.; Payne, S.; Tratalos, J.; Warren, P.; Lomas, K.J.;
Gaston, K.J. Ecological and Psychological Value of Urban Green Space. In Dimensions of
the Sustainable City; Jenks, J., Jones, C., Eds; Springer: Dordrecht, The Netherlands, 2010;
3. Wilson, E.O. Biophilia; Harvard University Press: Cambridge, MA, USA, 1984.
4. Aldous, D.E. Social, environmental, economic, and health benefits of green spaces. Acta Hort.
2007, 762, 171–184.
5. Thoreau, H.D. Walden; Ticknor and Fields: Boston, MA, USA, 1854.
6. Bowler, D.E.; Buyung-Ali, L.M.; Knight, T.M.; Pullin, A.S. A systematic review of evidence for
the added benefits to health of exposure to natural environments. BMC Public Health 2010, 10, 456,
7. Irvine, K.N.; Warber, S.L. Greening Healthcare: Practicing as if the natural environment really
mattered. Altern. Ther. Health Med. 2002, 8, 76–83.
Int. J. Environ. Res. Public Health 2013, 10 931
8. Pretty, J. How nature contributes to mental and physical health. Spirit. Health Int. 2004, 5,
9. Ulrich, R.S. View through a window may influence recovery from surgery. Science 1984, 224,
10. Maas, J.; Verheij, R.A.; Groenewegen, P.P.; de Vries, S.; Spreeuwenberg, P. Green space,
urbanity, and health: How strong is the relation? J. Epidemiol. Community Health 2006, 60,
11. Richardson, E.A.; Mitchell, R. Gender differences in relationships between urban green space
and health in the United Kingdom. Soc. Sci. Med. 2010, 71, 568–575.
12. Bodin, M.; Hartig, T. Does the outdoor environment matter for psychological restoration gained
through running? Psychol. Sport Exerc. 2001 4, 141–153.
13. Kaplan, R. The nature of the view from home: Psychological benefits. Environ. Behav. 2001, 33,
14. Fuller, R.A.; Irvine, K.N.; Devine-Wright, P.; Warren, P.H.; Gaston, K.J. Psychological benefits
of greenspace increase with biodiversity. Biol. Lett. 2007, 3, 390–394.
15. Han, K. Influence of limitedly visible leafy indoor plants on the psychology, behaviour, and
health of students at a junior high school in Taiwan. Environ. Behav. 2009, 41, 658–692.
16. Shinew, K.J.; Glover, T.D.; Parry, D.C. Leisure spaces as potential sites for interracial
interaction: Community gardens in urban areas. J. Leisure Res. 2004, 36, 336–355.
17. Shin, W.S.; Yeoun, P.S.; Yoo, R.W.; Shin, C.S. Forest experience and psychological health
benefits. Environ. Health Prev. Med. 2010, 15, 38–47.
18. Hansem-Ketchum, P.; Marck, P.; Reutter, L. Engaging with nature to promote health: New
directions for nursing research. J. Adv. Nurs. 2009, 65, 1527–1538.
19. Maller, C.; Townsend, M.; Pryor, A.; Brown, P.; St Leger, L. Healthy nature healthy people:
“Contact with nature” as an upstream health promotion intervention for populations. Health
Promot. Int. 2006, 21, 45–54.
20. Frumkin, H. Healthy places: Exploring the evidence. Amer. J. Public Health 2003, 93, 1451–1456.
21. Barker, S.B.; Wolen, A.R. The benefits of human-companion animal interaction: A review.
J. Vet. Med. Educ. 2008, 35, 487–495.
22. Bringslimark, T.; Hartig, T.; Patil, G.G. The psychological benefits of indoor plants: A critical
review of the experimental literature. J. Environ. Psychol. 2009, 29, 422–433.
23. Brown, C.; Grant, M. Biodiversity and human health: What role for nature in healthy urban
planning? Built Environ. 2005, 31, 326–338.
24. Mitchell, R.; Popham, F. Effect of exposure to natural environment on health inequalities:
An observational population study. Lancet 2008, 372, 1655–1660.
25. Kuo, F.E.; Sullivan, W.C. Environment and crime in the inner city: Does vegetation reduce
crime. Environ. Behav. 2001, 33, 343–367.
26. Fischer, A.G. Latitudinal variations in organic diversity. Evolution 1960, 14, 64–81.
27. Boakes, E.H.; Mace, G.M.; McGowan, P.J.K.; Fuller, R.A. Extreme contagion in global habitat
clearance. Proc. Roy. Soc. B Biol. Sci. 2010, 277, 1081–1085.
Int. J. Environ. Res. Public Health 2013, 10 932
28. Kasturiratne, A.; Wickremasinghe, A.R.; de Silva, N.; Gunawardena, N.K.; Pathmeswaran, A.;
Premaratna, R.; Savioli, L.; Lalloo, D.G., de Silva, H.J. The global burden of snakebite:
A literature analysis and modelling based on regional estimates of envenoming and deaths. PLoS
Med. 2008, 5, e218, doi: 10.1371/journal.pmed.0050218.
29. Grace, D.; Mutua, F.; Ochungo, P.; Kruska, R.; Jones, K.; Brierley, L.; Lapar, L.; Said, M.;
Herrero, M.; Phuc, P.M.; Thao, N.B.; Akuku, I.; Ogutu, F. Mapping of Poverty and Likely
Zoonoses Hotspots. Zoonoses Project 4. Report to the UK Department for International
Development; International Livestock Research Institute: Nairobi, Kenya, 2012.
30. Teel, T.L.; Manfredo, M.J.; Stinchfield, H.M. The need and theoretical basis for exploring
wildlife value orientations cross-culturally. Hum. Dimens. Wildl. 2007, 12, 297–305.
31. Warber, S.L.; Irvine, K.N. Relationship between People and Plants. In Natural Products from
Plants, 2nd ed.; Cseke, L.J., Kirakosyan, A., Kaufman, P., Warber, S., Duke, J.A., Brielmann, H.,
Eds.; CRC Press/Taylor and Francis Group, LLC: Boca Raton, FL, USA, 2006; pp. 535–546.
32. Pretty, J.; Peacock, J.; Sellens, M.; Griffin, M. The mental and physical health outcomes of green
exercise. Int. J. Environ. Health Res. 2005, 15, 319–337.
33. Irvine, K.N.; Warber, S.L.; Devine-Wright, P.; Gaston, K.J. Understanding urban green space as
a health resource: A qualitative comparison of visit motivation and derived effects among park
users in Sheffield, UK. Int. J. Environ. Res. Public Health 2013, 10, 417–442.
34. Pimentel, D.; Wilson, C.; McCullum, C.; Huang, R.; Dwen, P.; Flack, J.; Tran, Q.; Saltman, T.;
Cliff, B. Economic and environmental benefits of biodiversity. BioScience 1997, 47, 747–757.
35. Bringslimark, T.; Hartig, T.; Patil, G.G. Psychological benefits of indoor plants in workplaces:
Putting experimental results into context. HortScience 2007, 42, 581–587.
36. Dijkstra, K.; Pieterse, M.E.; Pruyn, A. Stress-reducing effects of indoor plants in the built
healthcare environment: The mediating role of perceived attractiveness. Prev. Med. 2008, 47,
37. Hansmann, R.; Hug, S.; Seeland, K. Restoration and stress relief through physical activities in
forests and parks. Urban Forestry Urban Greening 2007, 6, 213–225.
38. Kaplan, R. Some psychological benefits of gardening. Environ. Behav. 1973, 5, 145–162.
39. Cackowski, J.M.; Nasar, J.L. The restorative effects of roadside vegetation: Implications for
automobile driver anger and frustration. Environ. Behav. 2003, 35, 736–751.
40. Oh, C.; Dixon, A.W.; Mjelde, J.W.; Draper, J. Valuing visitors’ economic benefits of public
beach access points. Ocean Coast. Manage. 2008, 51, 847–853.
41. Curtin, S. Wildlife tourism: The intangible, psychological benefits of human-wildlife encounters.
Curr. Issues Tourism 2009, 12, 451–474.
42. Fredrickson, L.M.; Anderson, D.H. A qualitative exploration of the wilderness experience as a
source of spiritual inspiration. J. Environ. Psychol. 1999, 19, 21–39.
43. Bennett, L.W.; Cardone, S.; Jarczyk, J. Effects of a therapeutic camping program on addiction
recovery. J. Subst. Abuse Treat. 1998, 15, 469–474.
44. Ulrich, R.S. Natural versus urban scenes: Some psychophysiological effects. Environ. Behav.
1981, 13, 523–556.
45. Ulrich, R.S. Stress recovery during exposure to natural and urban environments. J. Environ.
Psychol. 1991, 11, 201–230.
Int. J. Environ. Res. Public Health 2013, 10 933
46. Hartig, T.; Mang, M.; Evans, G.W. Restorative effects of natural environment experiences.
Environ. Behav. 1991, 23, 3–26.
47. Williams, K.; Harvey, D. Transcendent experience in forest environments. J. Environ. Psychol.
2001, 21, 249–260
48. Ransom, K.P.; Mangi, S.C. Valuing recreational benefits of coral reefs: The case of Mombasa
Marine National Park and Reserve, Kenya. Environ. Manage. 2008, 45, 145–154.
49. Shin, W.S.; Jaakson, R.; Kim, E.I. Benefits-based analysis of visitor use of Sorak-San National
Park in Korea. Environ. Manage. 2001, 28, 413–419.
50. Pearson, L.J.; Tisdell, C.; Lisle, A.T. The impact of Noosa National Park on surrounding
property values: An application of the hedonic price method. Econ. Anal. Pol. 2002, 32, 155–171.
51. Zeppel, H. Education and conservation benefits of marine wildlife tours: Developing free choice
learning experiences. J. Environ. Educ. 2008, 39, 3–18.
52. Serpell, J. Beneficial effects of pet ownership on some aspects of human health and behaviour.
J. Roy. Soc. Med. 1991, 84, 717–720.
53. Lepczyk, C.A.; Mertig, A.G.; Liu, J. Assessing landowner activities related to birds across
rural-to-urban landscapes. Environ. Manage. 2004, 33, 110–125.
54. Gaston, K.J.; Fuller, R.A.; Loram, A.; MacDonald, C.; Power, S.; Dempsey, N. Urban domestic
gardens (XI): Variation in urban wildlife gardening in the United Kingdom. Biodivers. Conserv.
2007, 16, 3227–3238.
55. Clayton, S. Domesticated nature: Motivations for gardening and perceptions of environmental
impact. J. Environ. Psychol. 2007, 27, 215–224.
56. Clayton, S.; Myers, G. Conservation Psychology: Understanding and Promoting Human Care
for Nature; Wiley-Blackwell: New York, NY, USA, 2009.
57. Leather, P.; Pyrgas, M.; Beale, D.; Lawrence, C. Windows in the workplace: Sunlight, view and
occupational stress. Environ. Behav. 1998, 30, 739–762.
58. Shibata, S.; Suzuki, N. Effects of the foliage plant on task performance and mood. J. Environ.
Psychol. 2002, 22, 265–272.
59. Bixler, R.D.; Floyd, M.F. Nature is scary, disgusting and uncomfortable. Environ. Behav. 1997,
60. Kaplan, R. Some psychological benefits of an outdoor challenge program. Environ. Behav. 1974,
61. Maller, C.J. Promoting children’s mental, emotional and social health through contact with
nature: A model. Health Educ. 2009, 109, 522–543.
62. Kuo, F.E.; Sullivan, W.C. Aggression and violence in the inner city: Effects of environment via
mental fatigue. Environ. Behav. 2001, 33, 543–571.
63. Moore, M.; Townsend, M.; Oldroyd, J. Linking human and ecosystem health: The benefits of
community involvement in conservation groups. EcoHealth 2007, 3, 255–261.
64. Catanzaro, C.; Ekanem, E. Home gardeners value stress reduction and interaction with nature.
Acta Hort. 2004, 639, 269–275.
65. Chang, C.; Chen, P. Human response to window views and indoor plants in the workplace.
HortScience 2005, 40, 1354–1359.
Int. J. Environ. Res. Public Health 2013, 10 934
66. Herzog, T.R.; Black, A.M.; Fountaine, K.A.; Knotts, D.J. Reflection and attentional recovery as
distinctive benefits of restorative environments. J. Environ. Psychol. 1997, 17, 165–170.
67. Han, K. An exploration of relationships among the responses to natural scenes: Scenic beauty,
preference and restoration. Environ. Behav. 2010, 42, 243–270.
68. Fjeld, T.; Veiersted, B.; Sandvik, L.; Riise, G.; Levy, F. The effect of indoor foliage plants on
health and discomfort symptoms among office workers. Indoor Built Environ. 1998, 2, 204–209.
69. Wells, N.M. At home with nature: Effects of “greenness” on children’s cognitive functioning.
Environ. Behav. 2000, 32, 775–795.
70. Van den Berg, A.E.; Custers, M.H.G. Gardening promotes neuroendocrine and affective
restoration from stress. J. Health Psychol. 2011, 16, 3–11.
71. Yamaguchi, M.; Deguchi, M.; Miyazaki, Y. The effects of exercise in forest and urban
environments on sympathetic nervous activity of normal young adults. J. Int. Med. Res. 2006, 34,
72. Kingsley, J.; Townsend, M. “Dig in” to social capital: Community gardens as mechanisms for
growing urban social connectedness. Urban Pol. Res. 2006, 24, 525–537.
73. Coley, R.L.; Sullivan, W.C.; Kuo, F.E. Where does community grow?: The social context
created by nature in urban public housing. Environ. Behav. 1997, 29, 468–494.
74. Westphal, L.M. Urban greening and social benefits: A study of empowerment outcomes.
J. Arboric. 2003, 29, 137–147.
75. Bolitzer, B.; Netusil, N.R. The impact of open spaces on property values in Portland, Oregon.
J. Environ. Manage. 2000, 59, 185–193.
76. Jim, C.Y.; Chen, W.Y. Perception and attitude of residents toward urban green spaces in
Guangzhou (China). Environ. Manage. 2006, 38, 338–349.
77. Pretty, J.; Peacock, J.; Hine, R.; Sellens, M.; South, N.; Griffin, N. Green exercise in the UK
countryside: Effects on health and psychological well-being, and implications for policy and
planning. J. Environ. Plann. Manag. 2007, 50, 211–231.
78. Kerr, J.H.; Fujiyama, H.; Sugano, A.; Okamura, T.; Chang, M.; Onouha, F. Psychological
responses to exercising in laboratory and natural environments. Psychol. Sport Exerc. 2006, 7,
79. Lohr, V.I.; Pearson-Mims, C.H. Children’s active and passive interactions with plants influence
their attitudes as actions toward trees and gardening as adults. HortTechnology 2005, 15, 472–476.
80. Chawla, L. Life paths into effective environmental action. J. Environ. Educ. 1999, 31, 15–26.
81. Pyle, R.M. Nature matrix: Reconnecting people and nature. Oryx 2003, 37, 206–214.
82. Chawla, L. Significant life experiences revisited: A review of research on sources of
environmental sensitivity. Environ. Educ. Res. 1998, 4, 369–382.
83. Miller, J.R. Biodiversity conservation and the extinction of experience. Trends Ecol. Evol. 2005,
84. Samways, M.J. Rescuing the extinction of experience. Biodivers. Conserv. 2007, 16, 1995–1997.
85. Mayer, F.S.; Frantz, C.M. The connectedness to nature scale: A measure of individuals’ feeling
in community with nature. J. Environ. Psychol. 2004, 24, 503–515.
86. Nisbet, E.K.; Zelenski, J.M.; Murphy, S.A. The Nature Relatedness Scale. Environ. Behav. 2009,
Int. J. Environ. Res. Public Health 2013, 10 935
87. Dunlap, R.E.; Van Liere, K.D.; Mertig, A.G.; Jones, R.E. New trends in measuring
environmental attitudes: Measuring endorsement of the New Ecological Paradigm: A revised
NEP scale. J. Soc. Issues 2000, 56, 425–442.
88. Kaplan, R.; Kaplan, S. The Experience of Nature: A Psychological Perspective; Cambridge
University Press: Cambridge, UK, 1989.
89. Berman, M.G.; Jonides, J.; Kaplan, S. The cognitive benefits of interacting with nature. Psychol. Sci.
2008, 19, 1207–1212.
90. Hartig, T.; Kaiser, F.G.; Strumse, E. Psychological restoration in nature as a source of motivation
for ecological behaviour. Environ. Conserv. 2007, 34, 291–299.
91. Taylor, A.F.; Kuo, F.E.; Sullivan, W.C. Coping with ADD: The surprising connection to green
play settings. Environ. Behav. 2001, 33, 54–77.
92. Larsen, L.; Adams, J.; Deal, B.; Kweon, B.S.; Tyler, E. Plants in the workplace: The effects of
plant density on productivity, attitudes, and perceptions. Environ. Behav. 1998, 30, 261–281.
93. Health Council of the Netherlands and Dutch Advisory Council for Research on Spatial
Planning, Nature and the Environment. Nature and Health: The Influence of Nature on Social,
Psychological and Physical Well-being; Health Council of the Netherlands and RMNO: The
Hague, The Netherlands, 2004.
94. Orams, M.B. Feeding wildlife as a tourism attraction: A review of issues and impacts. Tourism
Manag. 2002, 23, 281–293.
95. Hawk, S.R.; Hull, M.I.; Thalman, R.I.; Richins, P.M. Review of spiritual health: Definitions, role
and intervention strategies in health promotion. Am. J. Health Promot. 1995, 9, 371–378.
96. Zuefle, D.M. The spirituality of recreation. Parks Recreation 1999, 34, 28.
97. Warber, S.L.; Irvine, K.N. Nature and Spirit. In Measuring the Immeasurable; Sounds True, Inc.:
Boulder, CO, USA, 2008; pp. 135–155.
98. Morancho, A.B. A hedonic valuation of urban green areas. Landsc. Urban Plann. 2003, 66, 35–41.
99. Troy, A.; Grove, J.M. Property values, parks, and crime: A hedonic analysis in Baltimore, MD.
Landsc. Urban Plann. 2008, 87, 233–245.
100. Oleyar, M.D.; Greve, A.I.; Withey, J.C.; Bjorn, A.M. An integrated approach to evaluating urban
forest functionality. Urban Ecosyst. 2008, 11, 289–308.
101. Chibnik, M. The value of subsistence production. J. Anthropol. Res. 1978, 34, 561–576.
102. Millennium Ecosystem Assessment. Ecosystems and Human Well-being: Biodiversity Synthesis;
World Resources Institute: Washington, DC, USA, 2005.
103. Pyle, R.M. The extinction of experience. Horticulture 1978, 56, 64–67.
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