Climate Change in the American Mind

Abstract

This report is based on findings from a nationally representative survey – Climate Change in the American Mind
– conducted by the Yale Project on Climate Change Communication (http://environment.yale.edu/climatecommunication) and the George Mason University Center for Climate Change Communication (http://www.climatechangecommunication.org). Interview dates: October 17-28, 2014. Interviews: 1,275 Adults (18+). Average margin of error: +/- 3 percentage points at the 95% confidence level. The research was funded by the 11th Hour Project, the Energy Foundation, the Grantham Foundation, and the V.K. Rasmussen Foundation

Full text

climate change
in the american mind
October 2014

Climate Change in the American Mind: October 2014 1
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Table of Contents
Introduction ............................................................................................................................... 2
Key Findings .............................................................................................................................. 4
!
1. Global Warming Beliefs and Attitudes .....................................................................................................6
2. Perceived Risk of Global Warming ........................................................................................................ 12
3. The Role for Government in Addressing Global Warming ............................................................... 15
4. Support for Policies to Reduce or Protect Against Global Warming ............................................... 18
Appendix I: Questionnaire with Topline Data ....................................................................... 21
Appendix II: Survey Method ................................................................................................... 40
Appendix III: Sample Demographics ..................................................................................... 42

Climate Change in the American Mind: October 2014 2
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Introduction
This report is based on findings from a nationally representative survey – Climate Change in the American Mind
– conducted by the Yale Project on Climate Change Communication (http://environment.yale.edu/climate-
communication) and the George Mason University Center for Climate Change Communication
(http://www.climatechangecommunication.org). Interview dates: October 17-28, 2014. Interviews: 1,275
Adults (18+). Average margin of error: +/- 3 percentage points at the 95% confidence level. The research
was funded by the 11th Hour Project, the Energy Foundation, the Grantham Foundation, and the V.K.
Rasmussen Foundation.
Principal Investigators:
Anthony Leiserowitz, PhD
Yale Project on Climate Change Communication
School of Forestry & Environmental Studies
Yale University
(203) 432-4865
anthony.leiserowitz@yale.edu
Edward Maibach, MPH, PhD
Center for Climate Change Communication
Department of Communication
George Mason University
(703) 993-1587
emaibach@gmu.edu
Connie Roser-Renouf, PhD
Center for Climate Change Communication
Department of Communication
George Mason University
croserre@gmu.edu
Geoff Feinberg
Yale Project on Climate Change Communication
School of Forestry & Environmental Studies
Yale University
(203) 432-7438
geoffrey.feinberg@yale.edu
Seth Rosenthal, PhD
Yale Project on Climate Change Communication
School of Forestry & Environmental Studies
Yale University
seth.rosenthal@yale.edu

Climate Change in the American Mind: October 2014 3
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Jennifer Marlon, PhD
Yale Project on Climate Change Communication
School of Forestry & Environmental Studies
Yale University
jenn.marlon@yale.edu
Cite as: Leiserowitz, A., Maibach, E., Roser-Renouf, C., Feinberg, G., Rosenthal, S., & Marlon, J. (2014)
Climate change in the American mind: October, 2014. Yale University and George Mason University. New Haven,
CT: Yale Project on Climate Change Communication.
!

Climate Change in the American Mind: October 2014 4
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Key Findings
!
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• Today, two thirds of Americans think global warming is happening (66%, up 3 percentage points since
November, 2013), whereas only about one in six think it is not happening (16%, down 7 points).
• The public’s understanding of what is causing global warming, however, is largely at odds with climate
science. Currently, only half of Americans (50%) think that global warming, if it is happening, is mostly
caused by human activities. By contrast, several recent studies have found that almost all climate
scientists active in the field (e.g., 97%, according to Cook et al., 2013) have concluded that human-
caused global warming is happening.
• Just over half of Americans (55%) say they are at least “somewhat worried” about global warming, but
only 11% say they are “very worried” about it.!Even as the impacts of global warming have increased
over time, public worry has remained relatively steady, changing little over the past four years.!
• According to the 2014 U.S. National Climate Assessment and other sources, the impacts of global
warming are starting to be felt in the United States. Yet only one in three Americans (33%) thinks
people in the U.S. are being harmed “right now” by global warming, a number that has remained steady
for the past several years.!
• Americans are also less likely to believe global warming will cause a “great deal” or “moderate amount”
of harm to them personally (36%) than to their family (42%), people in their community (43%), people
in the U.S. (53%), people in other industrialized countries (53%), people in developing countries (55%),
plant or animal species (64%), or future generations of people (64%). !
• Americans think both the private and public sectors should be doing more to address global warming.
Majorities say corporations and industry (67%) and citizens themselves (63%) should be doing “much
more” or “more” to address it.!
Half or more also believe federal, state, and local governments should be doing more:!
o The U.S. Congress (57%)
o My member of Congress (54%)
o My local government officials (53%)
o My governor (53%)
o President Obama (51%)

Climate Change in the American Mind: October 2014 5
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• Americans support a broad range of policies that would help reduce or respond to global warming. For
example, solid majorities “strongly” or “somewhat” support the following:
o Increased funding for improvements to local roads, bridges, and buildings to make them more
resistant to extreme weather (83%)
o Funding more research into renewable energy sources such as solar and wind power (77%)
o Providing tax rebates to people who purchase energy-efficient vehicles or solar panels (77%)
o Regulating carbon dioxide as a pollutant (75%)
o Setting strict carbon dioxide emission limits on existing coal-fired power plants to reduce global
warming and improve public health, where (a) power plants would have to reduce their emissions
and/or invest in renewable energy and energy efficiency and (b) the cost of electricity to consumers
and companies would likely increase (67%)
o Requiring electric utilities to produce at least 20% of their electricity from wind, solar, or other
renewable energy sources, even if it costs the average household an extra $100 a year (62%)
!
• About one in five Americans (22%) say they are currently part of – or would “definitely” or “probably”
be willing to join – a campaign to convince elected officials to take action to reduce global warming.
!
!
!

Climate Change in the American Mind: October 2014 6
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1. Global Warming Beliefs and Attitudes
!
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1.1. A majority of Americans think global warming is happening.!
!
Four times more Americans think global warming is happening than think it is not happening.
Two in three (66%) Americans think global warming is happening, up 3 points since November 2013. By
contrast, only about one in six Americans (16%) thinks global warming is not happening, down 7 points
since November 2013.
Majorities of Americans across age, sex, and education levels think global warming is happening. !

Climate Change in the American Mind: October 2014 7
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1.2. Trend: Americans who think global warming is not happening may be growing more certain of
their beliefs. !
!
While the overall number of Americans who think global warming is not happening has decreased in the past
year, those that hold this view have become more certain of their beliefs (from 41% in April 2014 to about
half – 53% – today). This change was largely driven by those who say they are “extremely sure” global
warming is not happening, who rose from 15% in April to 23% in October.!
!
Of those Americans who believe global warming is happening, over half are either extremely sure (24%) or
very sure (35%) it is.!
When asked if they need more information to form a firm opinion about global warming, the majority of
Americans (70%) say they do, while only three in ten (30%) say they do not need any more information.
Specifically, about one in four say they need “a little” more information (23%) or “some” more information
(27%), and one in five say they need “a lot” more information (20%).

Climate Change in the American Mind: October 2014 8
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1.3. Half of Americans think that if global warming is happening, it is mostly human caused.
The 2014 U.S. National Climate Assessment (written and reviewed by hundreds of climate experts over the
past 4 years) states: “the global warming of the past 50 years is primarily due to human activities,
predominantly the burning of fossil fuels. Many independent lines of evidence confirm that human activities
are affecting climate in unprecedented ways” (p. 15).1
!
Moreover, in a recent study investigating the degree of scientific consensus on climate change, Cook and
colleagues (2013) examined nearly 12,000 peer-reviewed papers in the climate science literature and found
that of those papers that stated a position on the reality of human-caused global warming, 97% said it is
happening and at least partly human caused.
!
Public understanding of climate change, however, is starkly different than the expert consensus.
Currently, half of Americans (50%) think that global warming, if it is happening, is mostly human caused, a
finding that has held steady since January, 2010. By contrast, one in three (32%) say they believe it is due
mostly to natural changes in the environment.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1 http://nca2014.globalchange.gov/report

Climate Change in the American Mind: October 2014 9
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1.4. About one in ten Americans knows that more than 90% of climate scientists have concluded
human-caused global warming is happening.
Very few Americans are aware that 97% percent of climate scientists agree than global warming is human-
caused. In fact, only about one in ten Americans thinks that over 90% of climate scientists agree global
warming is human caused, and fewer than half (47%) believe a majority do.1 !
This public misunderstanding of the scientific consensus – which has been found in each of our surveys
since 2008 – has significant consequences. Other research has identified public understanding of the
scientific consensus as a critical “gateway belief” that influences other important beliefs (i.e., global warming
is happening, human caused, a serious problem, and solvable) and support for action. For further
information, see:
Ding, D., Maibach, E. W., Zhao, X., Roser-Renouf, C., & Leiserowitz, A. (2011). Support for climate policy
and societal action are linked to perceptions about scientific agreement. Nature Climate Change, 1, 462–466,
doi:10.1038/nclimate1295
Lewandowsky, S., Gilles, G., & Vaughan, S. (2013). The pivotal role of perceived scientific consensus in
acceptance of science, Nature Climate Change, 3, 399–404, doi:10.1038/nclimate1729
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1!In our survey we asked respondents, who took it on a computer, to estimate the percentage of climate scientists who have concluded that
human-caused global warming is happening by moving a simulated “slider bar” which appeared on the screen of their computer. This slider bar
allowed respondents to move a marker from one end of the other, where placing the maker all the way to the left recorded a “0%” response, all
the way to the right a “100%” response, and any other whole number response at points in between.!

Climate Change in the American Mind: October 2014 10
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McCright, A. M., Dunlap, R. E. & Xiao, C. (2013). Perceived scientific agreement and support for action on
climate change in the USA, Climatic Change, 119, 511–518, doi:10.1007/s10584-013-0704-9

Climate Change in the American Mind: October 2014 11
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1.5. Over half of Americans are worried about global warming, but few are “very” worried.
Over half of Americans (56%) say they are at least “somewhat worried” about global warming, but only
11% say they are “very worried” about it.!
!
Even as the impacts of global warming have increased over time, public worry has remained relatively stable,
changing little over the past four years. It is lower today than in November 2008.!
Likewise, six in ten Americans (58%) say global warming is at least “somewhat” important to them
personally, but only one in five (21%) says it is “extremely” or “very” important to them. Four in ten (41%)
say the issue is “not too” or “not at all” important to them.

Climate Change in the American Mind: October 2014 12
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2. Perceived Risk of Global Warming
2.1. One in three Americans thinks people in the U.S. are being harmed right now by global
warming.
The impacts of global warming are starting to be felt in the United States. According to the 2014 U.S.
National Climate Assessment1:
“Residents of some coastal cities see their streets flood more regularly during storms and high
tides. Inland cities near large rivers also experience more flooding, especially in the Midwest and
Northeast. Insurance rates are rising in some vulnerable locations, and insurance is no longer
available in others. Hotter and drier weather and earlier snow melt mean that wildfires in the
West start earlier in the spring, last later into the fall, and burn more acreage. In Arctic Alaska,
the summer sea ice that once protected the coasts has receded, and autumn storms now cause
more erosion, threatening many communities with relocation” (p. 1).
Yet only one in three Americans (33%) thinks people in the U.S. are being harmed “right now” by global
warming, a number that has remained steady over the past several years.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1 http://nca2014.globalchange.gov/downloads

Climate Change in the American Mind: October 2014 13
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2.2. Most Americans think global warming is a relatively distant threat
Americans are less likely to think global warming will cause a “great deal” or “moderate amount” of harm to
them personally (36%) than to their family (42%), people in their community (43%), people in the U.S.
(53%), people in other industrialized countries (53%), people in developing countries (55%), plant or animal
species (64%), or future generations of people (64%).

Climate Change in the American Mind: October 2014 14
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2.3. Few Americans are optimistic humans will reduce global warming.
A plurality of Americans (44%) says humans could reduce global warming, but it’s unclear at this point
whether we will do what’s necessary.
Among the balance of Americans, the pessimists outnumber the optimists. Whereas only 7% say humans
can reduce global warming and will do so successfully, about one in five (22%) says we won’t because
people are unwilling to change their behavior, and nearly one in five (17%) says humans can’t reduce global
warming even if it is happening.

Climate Change in the American Mind: October 2014 15
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3. The Role for Government in Addressing Global Warming
3.1. A majority of Americans think the president and Congress should give high priority to
developing clean sources of energy. Nearly half think they should give high priority to global
warming.
A majority of Americans (63%) think the president and Congress should give a very high or high priority to
developing clean sources of energy, a critical part of any effort to reduce global warming. Moreover, few
(13%) believe they should give it a low priority.
Nearly half (45%) think the president and Congress should give a very high or high priority to global
warming. About three in ten (28%), however, think the matter should be given a low priority.
!
These numbers have held relatively steady for more than a year.

Climate Change in the American Mind: October 2014 16
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3.2. Americans are most likely to say corporations and industry, as well as citizens themselves,
should be doing more to address global warming.
Americans think both the private and public sectors should be doing more to address global warming.
Majorities say corporations and industry (67%) and citizens themselves (63%) should be doing “much
more” or “more” to address global warming.
Half or more also believe federal, state, and local government should be doing more:
• The U.S. Congress (57%)
• My member of Congress (54%)
• My local government officials (53%)
• My governor (53%)
• President Obama (51%)
Most Americans (86%) say the U.S. should make an effort to reduce global warming, even if it has
economic costs. One in four (27%) supports a large-scale effort even if there are large economic costs. A
plurality (39%) favors a medium-scale effort, even if it has moderate economic costs. And one in five (20%)
supports a small-scale effort, even if it has small economic costs. Relatively few (14%) say the United States

Climate Change in the American Mind: October 2014 17
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should make no effort to reduce global warming at all.1
Nearly six in ten Americans (57%) say the U.S. should reduce its own greenhouse gas emissions, regardless
of what other countries do, a number that has remained fairly stable over the past few years.
Relatively few (12%) say the U.S. should reduce its emissions only if other industrialized and/or developing
countries do – and only 6 percent of Americans say the U.S. should not reduce its greenhouse gas emissions.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1 Our previous research found that the average U.S. citizen is willing to pay 13 percent more for their electricity in support of a national clean
energy standard. (see Aldy, J., Kotchen, M., & Leiserowitz, A. (2012). Willingness to pay and political support for a U.S. national clean energy
standard. Nature Climate Change, 2, 596–599. doi:10.1038/nclimate1527).
!

Climate Change in the American Mind: October 2014 18
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4. Support for Policies to Reduce or Protect Against Global Warming
4.1. Americans support a broad range of policies that will help reduce or prepare for the impacts of
global warming
Solid majorities of Americans “strongly” or “somewhat” support the following:
• Increased funding for improvements to local roads, bridges, and buildings to make them more resistant
to extreme weather (83%)
• Funding more research into renewable energy sources such as solar and wind power (77%)
• Providing tax rebates to people who purchase energy-efficient vehicles or solar panels (75%)
• Regulating carbon dioxide as a pollutant (75%)
• Requiring electric utilities to produce at least 20% of their electricity from wind, solar, or other
renewable energy sources, even if it costs the average household an extra $100 a year (62%)

Climate Change in the American Mind: October 2014 19
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4.2. Two in three Americans support setting strict carbon dioxide emission limits on existing coal-
fired plants to reduce global warming and improve public health.
Americans by a two-to-one margin support (67%) rather than oppose (32%) the following policy:
“Set[ting] strict carbon dioxide emission limits on existing coal-fired power plants to reduce global
warming and improve public health. Power plants would have to reduce their emissions and/or invest
in renewable energy and energy efficiency. The cost of electricity to consumers and companies would
likely increase.”

Climate Change in the American Mind: October 2014 20
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4.3. One in five Americans say they would be willing to join a campaign to convince elected
officials to take action to reduce global warming.
Americans not only support policies to reduce global warming, but about one in five (22%) are currently
part of – or would “definitely” or “probably” be willing to join – a campaign to convince elected officials to
take action to reduce global warming.
Nearly half (46%) probably or definitely would not be willing to join such a campaign.

Climate Change in the American Mind: October 2014 21
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Appendix I: Data Tables of Questions Cited in the Report
(Base: Americans 18+)
Recently, you may have noticed that global warming has been getting some attention in the news. Global
warming refers to the idea that the world’s average temperature has been increasing over the past 150
years, may be increasing more in the future, and that the world’s climate may change as a result.
What do you think: Do you think that global warming is happening?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Yes
66
64
63
63
70
66
63
64
61
57
71
No
16
19
23
16
12
14
17
18
18
20
10
Don’t know
18
17
14
20
18
20
20
18
21
23
19
(Base: Americans 18+ who say global warming is happening)
How sure are you that global warming is happening?
Oct
2014
April
2014
Nov
2013
Sept
2012
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(815)
(649)
(521)
(674)
(722)
(658)
(619)
(614)
(622)
(558)
(1,745)
%
%
%
%
%
%
%
%
%
%
%
Extremely sure
24
30
27
27
27
19
22
21
20
24
35
Very sure
35
32
31
33
30
34
35
33
37
35
37
Somewhat sure
38
33
39
37
40
42
39
40
40
37
24
Not at all sure
4
5
3
4
3
5
5
6
3
5
4

Climate Change in the American Mind: October 2014 22
!
(Base: Americans 18+ who say global warming is not happening)
How sure are you that global warming is not happening?
Oct
2014
April
2014
Nov
2013
Sept
2012
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(228)
(196)
(179)
(164)
(160)
(156)
(175)
(188)
(199)
(227)
(301)
%
%
%
%
%
%
%
%
%
%
%
Extremely sure
23
15
20
18
15
15
21
21
20
28
26
Very sure
30
26
36
28
27
41
37
31
31
31
28
Somewhat sure
35
47
36
42
45
35
37
38
44
34
38
Not at all sure
11
12
9
12
13
8
5
11
4
7
8
(Base: Americans 18+)
Assuming global warming is happening, do you think it is…
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Caused mostly by human
activities
50
52
47
49
54
46
50
47
50
47
57
Caused mostly by natural
changes in the environment
32
32
37
33
30
37
33
35
34
36
32
None of the above because
global warming isn’t happening
9
8
8
8
7
5
8
8
6
9
4
Other
9
8
8
11
8
11
8
9
8
7
6

Climate Change in the American Mind: October 2014 23
!
(Base: Americans 18+)
Which comes closest to your own view?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Most scientists think global
warming is happening
44
40
42
42
44
35
41
39
34
34
47
Most scientists think global
warming is not happening
3
5
6
4
3
3
3
4
4
5
3
There is a lot of disagreement
among scientists about whether
or not global warming is
happening
31
32
33
33
36
41
39
40
45
40
33
Don’t know enough to say
22
23
18
20
18
21
18
18
17
22
18
(Base: Americans 18+)
To the best of your knowledge, what percentage of climate scientists think that human-caused global
warming is happening? Please click on the slider bar below to indicate your answer. You can slide the
indicator to the position that best describes your opinion. If the indicator does not work, you can enter a
number in the number box.
Oct
2014
(1,275)
%
Of those who provided a rating:
Mean
65
Median
67
Percent who did not provide a rating (Don’t know/Refused)
30

Climate Change in the American Mind: October 2014 24
!
(Base: Americans 18+)
How worried are you about global warming?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Very worried
11
14
15
14
16
11
12
9
12
12
17
Somewhat worried
45
41
38
37
42
43
42
43
41
38
46
Not very worried
26
27
26
30
25
30
31
28
30
27
24
Not at all worried
18
18
20
19
17
16
15
20
18
23
13
(Base: Americans 18+)
How important is the issue of global warming to you personally?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Extremely important
5
8
8
8
6
6
6
7
6
5
11
Very important
16
17
14
13
17
14
13
15
18
15
21
Somewhat important
37
38
33
36
36
41
41
38
39
38
40
Not too important
24
21
26
24
24
23
25
25
24
23
18
Not at all important
18
16
19
18
17
16
15
14
14
20
11

Climate Change in the American Mind: October 2014 25
!
(Base: Americans 18+)
How much do you think global warming will harm…?
You personally
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
12
13
13
15
16
11
9
11
10
14
10
A moderate amount
24
25
25
25
26
18
21
18
21
23
22
Only a little
26
26
27
26
25
30
28
28
27
22
24
Not at all
27
25
26
23
20
29
25
25
24
31
22
Don’t know
11
11
8
11
13
11
17
18
18
11
23
Your family
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
15
16
17
17
18
12
10
13
11
15
11
A moderate amount
28
27
25
27
28
21
24
21
25
25
24
Only a little
23
24
25
23
23
29
27
26
24
21
23
Not at all
23
21
24
20
17
26
21
23
21
28
19
Don’t know
11
11
9
12
14
12
18
18
19
11
23

Climate Change in the American Mind: October 2014 26
!
(Base: Americans 18+)
How much do you think global warming will harm…? (Cont’d.)
People in your community
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
16
17
14
17
19
12
11
12
11
15
13
A moderate amount
27
28
29
28
29
22
24
33
25
27
26
Only a little
23
24
24
23
23
29
27
26
24
22
20
Not at all
22
20
23
18
15
24
21
22
21
24
17
Don’t know
11
11
10
13
13
13
18
18
19
12
23
People in the United States
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
23
23
23
22
26
18
15
16
16
22
21
A moderate amount
30
30
30
30
31
28
29
26
28
29
28
Only a little
20
18
19
19
17
24
23
23
22
16
15
Not at all
17
18
20
16
12
18
17
17
17
22
14
Don’t know
11
11
8
12
13
12
16
18
18
12
22

Climate Change in the American Mind: October 2014 27
!
(Base: Americans 18+)
How much do you think global warming will harm…? (Cont’d.)
People in other modern industrialized countries
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
24
22
25
21
26
20
17
17
17
23
22
A moderate amount
29
31
29
32
31
29
29
25
28
29
28
Only a little
18
19
19
18
18
21
22
23
21
16
13
Not at all
17
16
19
15
11
17
15
17
15
19
13
Don’t know
11
12
9
13
15
13
17
19
18
13
24
People developing countries
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
29
31
32
30
35
26
22
23
22
29
31
A moderate amount
26
24
24
25
29
26
28
22
28
25
22
Only a little
16
17
17
18
10
19
17
20
17
14
11
Not at all
17
16
19
13
11
16
15
17
15
19
13
Don’t know
12
12
9
13
15
14
18
19
18
13
24

Climate Change in the American Mind: October 2014 28
!
(Base: Americans 18+)
How much do you think global warming will harm…? (Cont’d.)
Future generations of people
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
46
49
46
42
47
43
40
37
39
42
44
A moderate amount
18
18
19
21
21
22
22
22
22
22
17
Only a little
11
10
11
12
9
12
13
10
11
9
7
Not at all
13
12
15
12
8
11
10
12
12
15
10
Don’t know
13
11
9
12
14
13
16
19
16
12
22
Plant and animal species
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A great deal
44
47
46
39
43
43
41
39
40
43
45
A moderate amount
20
19
19
24
25
21
19
19
21
19
17
Only a little
10
12
11
13
11
13
16
12
12
11
8
Not at all
13
12
15
13
8
10
10
13
13
15
9
Don’t know
12
11
8
10
13
12
15
18
15
12
20

Climate Change in the American Mind: October 2014 29
!
(Base: Americans 18+)
When do you think global warming will start to harm people in the United States?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
They are being harmed right now
33
32
34
34
36
30
30
32
29
25
34
In 10 years
10
9
10
11
13
12
10
12
12
12
13
In 25 years
14
14
14
12
11
14
13
13
12
14
13
In 50 years
12
15
11
12
12
14
15
12
13
13
13
In 100 years
13
14
12
13
13
15
15
11
15
13
12
Never
18
16
18
17
15
16
16
20
19
23
15
(Base: Americans 18+)
On some issues, people feel that they have all the information they need in order to form a firm opinion,
while on other issues they would like more information before making up their mind. For global warming,
where would you place yourself?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
I need a lot more information
20
19
18
17
20
19
18
22
20
22
30
I need some more information
27
25
22
23
25
28
28
30
27
23
30
I need a little more information
23
25
26
25
25
23
27
25
29
26
22
I do not need any more
information
30
31
33
34
30
30
27
23
24
29
18

Climate Change in the American Mind: October 2014 30
!
(Base: Americans 18+)
Which of the following statements comes closest to your view?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Humans can reduce global
warming, and we are going to do
so successfully
7
6
5
3
5
4
4
5
5
10
6
Humans could reduce global
warming, but it’s unclear at this
point whether we will do what’s
needed
44
42
40
45
49
46
47
41
47
45
51
Humans could reduce global
warming, but people aren’t willing
to change their behavior, so
we’re not going to
22
25
25
24
22
21
25
25
21
17
22
Humans can’t reduce global
warming, even if it is happening
17
16
16
16
15
20
15
18
18
15
16
Global warming isn’t happening
10
10
13
11
8
9
10
11
10
13
5
!
(Base: Americans 18+)
Do you think…? (n=1,275)
Very high
High
Medium
Low
%
%
%
%
Global warming should be a low, medium, high, or
very high priority for the president and Congress?
17
28
26
28
Developing sources of clean energy should be a
low, medium, high, or very high priority for the
president and Congress?
29
34
23
13

Climate Change in the American Mind: October 2014 31
!
(Base: Americans 18+)
Do you think each of the following should be doing more or less to address global warming?
The U.S. Congress
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Much more
21
25
26
25
24
23
20
19
19
19
26
More
36
31
26
32
36
35
35
38
35
35
41
Currently doing the right amount
23
24
26
20
22
21
25
20
26
23
20
Less
10
8
9
11
8
12
11
11
10
10
6
Much less
11
10
13
10
9
9
8
12
9
15
7
President Obama
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Much more
16
18
18
18
18
19
19
19
20
17
28
More
34
31
28
34
35
35
33
35
32
33
38
Currently doing the right amount
26
29
31
24
29
25
28
22
30
26
21
Less
9
7
7
12
7
10
10
10
9
9
6
Much less
13
13
14
12
10
11
11
14
10
15
7
+President George W. Bush

Climate Change in the American Mind: October 2014 32
!
(Base: Americans 18+)
Do you think each of the following should be doing more or less to address global warming? (Cont’d.)
Corporations and industry
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Much more
35
36
40
39
39
40
37
34
38
33
41
More
32
30
25
31
32
30
30
31
28
31
32
Currently doing the right amount
20
20
20
18
18
18
20
18
22
21
17
Less
5
6
5
5
6
7
6
8
7
7
5
Much less
7
7
8
5
5
5
6
9
6
9
6
Citizens themselves
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Much more
23
23
27
24
25
27
26
28
31
27
30
More
39
42
34
39
41
40
39
35
33
36
42
Currently doing the right amount
23
22
23
25
23
22
24
21
24
23
20
Less
6
6
6
6
5
7
6
9
7
7
5
Much less
8
6
8
5
4
5
6
7
5
8
5

Climate Change in the American Mind: October 2014 33
!
(Base: Americans 18+)
Do you think each of the following should be doing more or less to address global warming? (Cont’d.)
Your local government officials
Oct
2014
(Unweighted base)
(1,275)
%
Much more
15
More
39
Currently doing the right amount
28
Less
8
Much less
10
Your governor
Oct
2014
(Unweighted base)
(1,275)
%
Much more
16
More
37
Currently doing the right amount
28
Less
9
Much less
10

Climate Change in the American Mind: October 2014 34
!
(Base: Americans 18+)
Do you think each of the following should be doing more or less to address global warming? (Cont’d.)
Your member of Congress
Oct
2014
(Unweighted base)
(1,275)
%
Much more
17
More
37
Currently doing the right amount
27
Less
9
Much less
10

Climate Change in the American Mind: October 2014 35
!
People disagree whether the United States should reduce greenhouse gas emissions on its own, or make
reductions only if other countries do so. Which of the following statements comes closest to your own
point of view? The United States should reduce its greenhouse gas emissions…
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Regardless of what other
countries do
57
58
60
59
61
63
60
61
65
57
67
Only if other industrialized
countries (such as England,
Germany, and Japan) reduce
their emissions
3
3
4
3
2
3
3
3
3
3
2
Only if other industrialized
countries and developing
countries (such as China, India,
and Brazil) reduce their
emissions
9
9
8
7
7
8
7
8
8
7
7
The U.S. should not reduce its
emissions
6
6
6
6
6
5
5
6
5
7
4
Don’t know/Refused
24
23
22
25
25
21
25
23
19
25
20

Climate Change in the American Mind: October 2014 36
!
(Base: Americans 18+)
How big of an effort should the United States make to reduce global warming?
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
A large-scale effort, even if it has
large economic costs
27
28
27
26
24
26
26
29
28
26
34
A medium-scale effort, even if it
has moderate economic costs
39
35
34
36
44
42
40
38
41
36
40
A small-scale effort, even if it has
small economic costs
20
21
22
22
19
19
23
19
18
21
17
No effort
14
16
17
14
12
13
12
14
13
18
9
(Base: Americans 18+)
How much do you support or oppose the following policies?
Fund more research into renewable energy sources, such as solar and wind power
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Strongly support
36
31
30
28
30
36
36
47
42
41
53
Somewhat support
41
44
42
42
43
43
42
37
45
44
39
Somewhat oppose
12
12
16
14
13
12
17
11
10
11
6
Strongly oppose
9
9
9
11
8
9
6
6
3
4
2

Climate Change in the American Mind: October 2014 37
!
(Base: Americans 18+)
How much do you support or oppose the following policies? (Cont’d.)
Provide tax rebates for people who purchase energy-efficient vehicles or solar panels
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Strongly support
36
29
28
26
29
30
30
41
41
32
38
Somewhat support
41
46
43
45
44
46
48
41
42
50
47
Somewhat oppose
13
11
17
15
14
13
14
10
12
10
11
Strongly oppose
9
11
9
8
7
11
7
9
5
7
4
Regulate carbon dioxide (the primary greenhouse gas) as a pollutant
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
March
2012
Nov
2011
May
2011
June
2010
Jan
2010
Nov
2008
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
(1,008)
(1,000)
(1,010)
(1,024)
(1,001)
(2,164)
%
%
%
%
%
%
%
%
%
%
%
Strongly support
29
23
24
23
21
25
25
NA
26
24
30
Somewhat support
46
45
43
45
45
50
48
NA
51
47
50
Somewhat oppose
13
17
17
16
18
15
20
NA
13
14
13
Strongly oppose
11
11
12
11
10
11
7
NA
11
15
7

Climate Change in the American Mind: October 2014 38
!
(Base: Americans 18+)
How much do you support or oppose the following policies? (Cont’d.)
Require electric utilities to produce at least 20% of their electricity from wind, solar, or other renewable
energy sources, even if it costs the average household an extra $100 a year
Oct
2014
April
2014
Nov
2013
April
2013
Sept
2012
(Unweighted base)
(1,275)
(1,013)
(830)
(1,045)
(1,061)
%
%
%
%
%
Strongly support
26
18
24
21
22
Somewhat support
36
37
35
38
37
Somewhat oppose
20
23
28
28
27
Strongly oppose
16
19
10
9
7
Increase funding for improvements to local roads, bridges, and buildings to make them more resistant to
extreme weather
Oct
2014
(Unweighted base)
(1,275)
%
Strongly support
31
Somewhat support
52
Somewhat oppose
10
Strongly oppose
7

Climate Change in the American Mind: October 2014 39
!
(Base: Americans 18+)
How much do you support or oppose the following policy?
Set strict carbon dioxide emission limits on existing coal-fired power plants to reduce global warming and
improve public health. Power plants would have to reduce their emissions and/or invest in renewable
energy and energy efficiency. The cost of electricity to consumers and companies would likely increase.
Oct
2014
(Unweighted base)
(1,275)
%
Strongly support
23
Somewhat support
44
Somewhat oppose
17
Strongly oppose
15
!
How willing or unwilling would you be to join a campaign to convince elected officials to take action to
reduce global warming?
Oct
2014
(1,275)
%
I am participating in a campaign like this now
1
I definitely would do it
4
I probably would do it
17
I probably would not do it
19
I definitely would not do it
28
Not sure
23
Refused/Prefer not to answer
9

Climate Change in the American Mind: October 2014 40
!
Appendix II: Survey Method
The data in this report are based on a nationally representative survey of 1,275 American adults, aged 18 and
older, conducted from October 17-28, 2014. All questionnaires were self-administered by respondents in a
web-based environment. The survey took, on average, about 29 minutes to complete.
The sample was drawn from GfK’s KnowledgePanel®, an online panel of members drawn using probability
sampling methods. Prospective members are recruited using a combination of random digit dial and
address-based sampling techniques that cover virtually all (non-institutional) resident phone numbers and
addresses in the United States. Those contacted who would choose to join the panel but do not have access
to the Internet are loaned computers and given Internet access so they may participate.
The sample therefore includes a representative cross-section of American adults – irrespective of whether
they have Internet access, use only a cell phone, etc. Key demographic variables were weighted, post survey,
to match US Census Bureau norms.
The survey instrument was designed by Anthony Leiserowitz, Geoff Feinberg, Seth Rosenthal, and Jenn
Marlon of Yale University, and Edward Maibach and Connie Roser-Renouf of George Mason University.
Margins of error
All samples are subject to some degree of sampling error—that is, statistical results obtained from a sample
can be expected to differ somewhat from results that would be obtained if every member of the target
population was interviewed. Average margins of error, at the 95% confidence level, are as follows:
• October 2014: Fielded October 17-28 with 1,275 American adults. The margin of sampling error is plus
or minus 3 percentage points.
• April 2014: Fielded April 21 – 24 with 1,013 American adults. The margin of sampling error is plus or
minus 3 percentage points.
• November 2013: Fielded November 23 through December 9 with 830 American adults. The margin of
sampling error is plus or minus 3 percentage points.
• April 2013: Fielded April 8-15 with 1,045 American adults. The margin of sampling error is plus or
minus 3 percentage points.
• September 2012: Fielded August 31 through September 12, 2012 with 1,061 American adults. The
margin of sampling error is plus or minus 3 percentage points.
• March 2012: Fielded March 12 through March 30, 2012 with 1,008 American adults. The margin of
sampling error is plus or minus 3 points.
• November 2011: Fielded October 20 through November 16 with 1,000 American adults. The margin of
sampling error is plus or minus 3 points.
• May 2011: Fielded April 23 through May 12 with 1,010 American adults. The margin of sampling error
is plus or minus 3 points.
• June 2010: Fielded May 14 through June 1 with 1,024 American adults. The margin of sampling error is
plus or minus 3 points.
• January 2010: Fielded December 24, 2009 through January 3, 2010 with 1,001 American adults. The
margin of sampling error is plus or minus 3 points.
• November 2008: Fielded October 7 through November 12 with 2,164 American adults. Data were

Climate Change in the American Mind: October 2014 41
!
collected in two waves: wave 1 from October 7 through October 20 and wave 2 from October 24
through November 12. The margin of sampling error is plus or minus 2 points.
Rounding error
For tabulation purposes, percentage points are rounded off to the nearest whole number. As a result,
percentages in a given chart may total slightly higher or lower than 100%.

Climate Change in the American Mind: October 2014 42
!
Appendix III: Sample Demographics
N
(unweighted)
%
(weighted)
Total
1,275
100
Sex
Men
629
48
Women
646
52
Age
Millennials (18-30)
208
23
Generation X (31-48)
338
29
Baby Boomers (49-67)
529
35
WWII (68+)
200
13
Education
Less than high school
78
12
High school graduate
388
30
Some college/tech
359
29
College graduate
252
17
Post graduate
198
13
Household Income
<$25K
237
18
$25K - <$50K
274
23
$50K - <$75K
237
18
$75K - <$100K
182
15
$100K - <$125K
168
13
$125K+
177
13
Hispanic
Yes
108
15
Race/Ethnicity
White, non-Hispanic
999
66
Black, African-American non-Hispanic
96
12
Other non-Hispanic
72
8
Region
Northeast
242
18
Midwest
314
21
South
442
37
West
277
23
!