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Bringing a governance perspective to plastic litter: A structural analysis of the German PET industry
Abstract
The challenge for a circular plastics economy transition is to focus policies on key leverage points that initiate actual system transitions. This requires a systemic perspective on the plastics industries. This study takes such a systemic perspective by employing a network approach to examine the often-underestimated complexity of interrelating markets in a circular plastics economy, and their structural sensitivity to governance interventions. Based on the case of polyethylene terephthalate (PET) markets in Germany, we investigate the structures and underlying dynamics of increasing circularity in the PET industry. Concerns about plastic litter accumulating in the natural environment have facilitated the development of niche markets for the recycling of plastic litter recovered from the environment. We systematically reveal that recycling markets connecting diverse waste sources with a broad range of new applications are key areas of intervention in the structural transitions towards circular industries. By connecting otherwise disconnected parts of the system, the recycling of recovered plastic litter is a key leverage point for the circular economy transition. We recommend to focus governance efforts on such key leverage markets as powerful venues to initiate systemic change.
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Scientific analysis and media coverage of rampant plastic pollution has taken a toll on the material's reputation in recent years, fueling talk of a “plastic crisis”. Brand owners have made ambitious pledges to overcome this crisis—but can voluntary commitments turn the tide? In this paper, we analyze the current flow of polyethylene terephthalate (PET) from production to recycling in the European Union (EU). We show that the pledged volume for recycled PET (rPET) to be used in the EU in 2025 amounts to 2.066 m tons, requiring the annual recycling growth rate to double in the next years compared to 2014–2018. Our results indicate that even widespread adoption of deposit return systems for bottles will not suffice, especially when increasing demand from other industries drives the price above the packaging producers’ willingness to pay. To realize the pledges, substantial investments and a regulatory framework for the targeted and sensible use of PET recyclate are necessary.
The journal Environmental Innovation and Societal Transitions (EIST) recently celebrated its tenth anniversary. Its development represents a great success, contributing substantially to the consolidation and maturation of the research field of sustainability transitions. However, being content with past successes will not be sufficient for tackling emerging challenges. In this perspective paper, we take stock of recent dynamics in the field by analyzing the evolving knowledge structure of the papers published in the journal. Based on these insights, we share the editorial priorities of the new editorial team and elaborate how we want to position the journal in the rapidly changing landscape of academic publishing. This is in the hope to align expectations with future authors and readers and to serve our quickly growing research field even better as it increasingly gains academic recognition and policy relevance.
Decision-makers in the public policy and business arenas need tools to deal with multiple sources of complexity in Circular Economy (CE) transitions. System Dynamics (SD) facilitates coping with increased complexity by enabling closed-loop thinking via identifying the causal structures underlying behaviour and permitting to proactively experiment with the system through simulation. This research aims to propose and test an SD-based framework for examining CE transitions to supporting decision-making at the micro-, meso-, and macro-levels. Two inductive model-based cases studies led to formalising the framework, finally tested in a third deductive model-based case study. The framework is built upon the well-known stages for building SD simulation models and complemented with domain-specific activities, guiding questions, and expected outcomes when examining CE transitions. The SD-based framework is the first modelling-oriented prescriptive approach to help researchers and practitioners examining CE transitions on their journeys to understand and facilitate changes through SD simulation models.
The plastic system is burdened with many inefficiencies that have been exposed, and exacerbated, by the outbreak of the coronavirus (SARS-CoV2) pandemic in December 2019, widely known as COVID-19, and which threaten society's commitment to transition to a sustainable plastics economy. This perspective aims to depict the structural and systemic inefficiencies of the plastics system, and illuminate: (a) the vulnerability of the recycling sector to macroeconomic – particularly to oil price – shocks; (b) the economics of the recycling system; (c) the political dimensions of the plastics sector. It emphasises that is unwise to think about plastics recycling as an insular and linear problem, due to the complexity and interconnectedness of different parts of the plastic system that affect and are affected by the intertwined processes, stakeholders and values. That said, the transition to a sustainable plastics system requires an integrated, knowledge-based systems approach that interrogates the dynamics and causal-effect relationships of the interconnected challenges. This analytical scrutiny can indicate where interventions are needed in the plastics systems towards creating transformational change.
Circular economy and especially circular business model (CBM), is currently being discussed as a way to enable the fashion industry's transition to sustainable business models wherein pollution and resource waste may be reduced. However, one of the prime reasons for a slow transition is lack of scalability of CBMs operating in the fashion retail value chain. What is lacking in the current discourse is research that summarises and condenses the literature on strategies for how scalability can be attained and what that means in context to CBMs where not only economic values are in focus. Therefore, the main purpose of this paper is to explore the main strategic approaches to scale business models and how these can be applied to CBMs in the fashion retail value chain. To do this, a two-part method is adopted consisting of a systematic literature review of 57 business models and scalability papers followed by a review of activities reported by 76 fashion retail companies on how these have, or are planning to, increase the scale of their CBM initiative. Our suggested model provides a basic understanding of strategies for business model scalability seen from four different business model design perspectives. These are further contextualised for CBMs in the fashion value chain and lessons learned are generated in the form of four central propositions. The propositions account on how organisations can leverage resources from their existing conventional business model for efficient scaling of their CBM initiative, how they can consider strategic partnerships to access complementary resources, while also embarking on adaptability by running business pilots either internally or by engaging in collaborative networks for industry-wide learnings and change.
Circular Economy (CE) has been one of the most transformational tendencies for the past years. What seemed to be one more organizational hype, is now appearing as a global trend, affecting macro, meso and microenvironments, ranging from governments, global organizations (such as the UN), the whole private sector, science, to final consumers and individuals. Despite the numerous CE definitions, a common sense regarding what CE means is still subject of studies. This opens space for misinterpretation and misuse, as well as greenwashing and image depreciation risks. Consequently, some organizations tend to shape CE to their own definitions and paradigms rather than changing their businesses. This article builds on previous work and aims to establish a common-sense CE definition, separating it from its enablers and related concepts, which seem to be the root causes of misuse. We asked 44 worldwide CE experts PhDs the same question: “Using your own words, please describe what you understand by “Circular Economy”. Database was complicated and analysed through a coded framework and triangulated with the support of R statistical tool. The main outcome is a final definition proposal, along with a structured CE framework. It is expected this research will provide resources to allow standards organizations to establish formal cross-industry CE policies and regulations, leading to scales, targets, KPI's development for CE assessments and audits; and guide organizations and governments on their CE transition roadmaps.
This study reviews existing legal, institutional and policy tools and frameworks, relevant to the introduction and adoption of new marine litter clean-up technologies in two regional European seas, the Mediterranean and the Baltic. A combination of desk studies in six countries bordering the Baltic (Estonia, Germany, Sweden) and the Mediterranean (Greece, Italy, Tunisia), and interviews with experts and stakeholders, is used to identify key drivers and barriers to the adoption and diffusion of marine litter technologies. The main conclusion of the study is that the most influential pieces of legislation relevant to marine litter management are top-down EU policies, often forming the basis of regional and national plans. Moreover, the study finds that several drivers of marine litter technologies may at the same time be critical barriers. These factors include public awareness, consumer behaviour, enforcement of legislation, and the rise of SMEs engaged in recycling and eco-labelling of marine litter.
As an integral part of plastic waste, large amounts of polyethylene terephthalate (PET), polyhydroxybutyrate (PHB), and solid waste have led to serious environmental problems. In order to identify critical barriers to the reuse of plastic across a wide range of plastic values all over the world, we need to go through PET and PHB in terms of volume. This is a significant factor for the world and our global warming. The current uses of plastic through PET and PHB are significant. Through the recycling process of PET and PHB, the total volume of plastic uses will be decreased and reuse rate will be high by economic, social, and environmental factors. Key areas are identified by low demand due to price considerations, insufficient tracking and transparency of pricing transactions, and lack of common design. Integration of value chains is considered to be the most important intervention for respondents, following the need for increased investment and technology development. Recycling helps the environment and creates new economic opportunities. Reuse of plastics encourages businesses to develop new and innovative products. Recycling reduces through extraction (mining, quarrying, and logging), refining, and processing of raw materials which create significant air and water pollution. As renewable energy saving also reduces greenhouse gas emissions, which help to cope with climate change. This paper aims to raise awareness that increase the demand of recycling process of PET and PHB and to identify critical barriers of recycling throughout a series of plastic prices with the volume.
In the past decade, the circular economy has gained attention as a mechanism of transition toward a regenerative, low carbon, and resource-efficient society. As the history of previous radical transformations shows, successful transition toward the circular economy cannot take place without understanding the institutional features of industrial transformations. This article highlights the significance of institutions by placing the circular economy model in the context of the natural resource–based sector and discusses the importance of institutions in regional path development. The article identifies three institutional determinants of both endogenous and directed transformation toward the circular economy model in the regional context: (i) proximity of physical flows and assets, (ii) maturation and diversity of market networks, and (iii) inherent values and patterns of cooperation. This article offers a starting point for future studies of circular economy transitions and the role of institutions as enabling, as well as at times obstructing transition environments.
The pressure that the human species exerts on the natural environment through the extraction of materials and generation of wastes is widely recognised. Circular economy has emerged as a potential solution to make better use of resources. Positioned as a technology-focused concept that can generate economic gains while alleviating pressure on the environment, circular economy enjoys a positive reception by organisations in public, private and civic sectors and, increasingly, academia alike. However, concerns have been raised regarding some purported circular economy practices being promoted as ‘sustainable’ yet resulting in detrimental impacts on environment and society. We briefly revisit the systems ecology literature that construed the context for both circular economy and sustainable development. Values and principles in core sustainable development literature are analysed to offer a foundation against which circular economy can be discussed. We then analyse and critically reflect upon the strengths, shortcomings and theoretical flaws within the values and principles that emerged from the evolving circular economy literature. We propose a value framework and set of ten principles for the design, implementation and evaluation of a sustainable circular economy. We finish with a call for action for both practitioners and a research agenda for academia.
Since the late 1990s, the trend of plastic waste shipment from developed to developing countries has been increasing. In 2017, China announced an unprecedented ban on its import of most plastic waste, resulting in a sharp decline in global plastic waste trade flow and changes in the treatment structure of countries, whose impacts on global environmental sustainability are enormous but yet unexamined. Here, through the life cycle assessment (LCA) method, we quantified the environmental impacts of changes in the flow patterns and treatment methods of 6 types of plastic waste in 18 countries subsequent to the ban. In the short term, the ban significantly improved four midpoint indicators of environmental impact, albeit contributed to global warming. An annual saving of about 2.35 billion euros of eco-cost was realized, which is equivalent to 56% of plastic waste global trade value in 2017. To achieve global environmental sustainability in the long run, countries should gradually realize the transition from export to domestic management, and from landfill to recycling, which would realize eco-costs savings of about 1.54–3.20 billion euros.
Over the past three decades, a rapidly expanding academic literature has investigated how new markets are created and how existing markets are transformed, phenomena this article refers to as “market innovation”. The literature on market innovation is currently fragmented and characterized by heterogeneity of terminology, theoretical paradigms, and empirical research settings. The purpose of this article is to map the field, identify distinct research clusters, and uncover shifts in the literature’s underpinning conceptual perspectives. Specifically, using bibliometric mapping, the article identifies six clusters of market innovation research. Further analysis reveals three major shifts in the literature over time: (1) a shift from reductionism to emergence, (2) a shift from central agency to distributed agency, and (3) a shift from linearity to non-linearity. To advance the understanding of all three shifts and move theory development forward, complexity theory offers a valuable meta-theoretical framework. Future research directions are derived from complexity theory.
The increasing amount of marine plastic waste poses challenges including, not only the collection, but also the subsequent recyclability of the plastic. An artificial accelerated weathering procedure was developed, which modelled the marine environment and investigated the recyclability of weathered and non-weathered PET. Marine conditions were simulated for poly(ethylene terephthalate) (PET) bottle material and high-density polyethylene (HDPE) cap material. It consisted of 2520 h cyclical weathering, alternating the sample between a salt spray and a Xenon-chamber—this corresponds to roughly 3–4 years on the surface of an ocean.
It was proved that the molecular weight of PET is a function of weathering time and can be described mathematically. Microscopic examination of the surface of the PET bottles and HDPE caps proved that these surfaces were damaged. After weathering, manufacturing tests were performed on the PET material by extrusion, injection moulding, 3D printing and thermoforming. Quantitative comparison between products manufactured by the same technology was performed in order to compare the qualities of products made from original PET, non-weathered PET waste, which was the example of classical recycling, and weathered PET. In the case of products made from weathered PET, certain mechanical and optical properties (e.g. impact strength and transparency) were significantly impaired compared to the original PET and the recycled, non-weathered PET. Certain other properties (e.g. strength and rigidity) did not change significantly. It was proved that the samples from weathered plastic material can be successfully recycled mechanically and used to manufacture plastic products.
Since the publication of the European Union's Circular Economy Action Plan in 2015, this new sustainability paradigm has become a guiding force behind the environmental and economic policies of the Junker Commission. The European Union (EU) has taken a particular approach to circularity, with high expectations to increase competitiveness, promote economic growth and create jobs while reducing environmental impacts and resource dependency. However, the circular economy (CE) is a contested paradigm, for which many competing interpretations exist, each seeking varying degrees of social, ecological and political transformation. Considering the emerging and contested state of the academic literature on CE, the EU's embrace of the concept is a remarkable phenomenon, which remains poorly researched. The aim of this paper is thus to address this research gap by analysing the CE discourse and policies of the Junker Commission (2014-2019) in order to critically discuss their sustainability implications and develop key policy recommendations. To do so, this research uses a combination of qualitative and quantitative research methods. The paper first critically analyses the EU's discourse based on a typology of circularity discourses. It then reviews the complex set of concrete CE policies and actions adopted by the EU and compares them to its discourse. Results show a dichotomy between words and actions, with a discourse that is rather holistic, while policies focus on “end of pipe” solutions and do not address the many socio-ecological implications of a circularity transition. Several actions are thus recommended to tackle the systemic challenges of a circular future from a plural perspective.
A mess of plastic
It is not clear what strategies will be most effective in mitigating harm from the global problem of plastic pollution. Borrelle et al. and Lau et al. discuss possible solutions and their impacts. Both groups found that substantial reductions in plastic-waste generation can be made in the coming decades with immediate, concerted, and vigorous action, but even in the best case scenario, huge quantities of plastic will still accumulate in the environment.
Science , this issue p. 1515 , p. 1455
Managing plastics has become a focal issue of the Anthropocene. Developments in plastic materials have made possible many of the technologies and conveniences that define our modern life. Yet, plastics are accumulating in landfills and natural environments, impacting resource utilization and ecosystem function. Solutions to these rising problems will require action and coordination across all stages of plastics value chains. Here, we offer the first contemporary plastics material flow by resin type through the US economy, encompassing 2017 production, sales, use markets and end-of-life management. This roadmap, while sourced from disparate and incomplete data, provides stakeholders with a system-scale context for understanding challenges, opportunities and implications of future interventions. More than three-quarters of the plastics reaching end of life went to landfill, and less than 8% was recycled. Packaging was the largest defined use market for plastics, but two thirds of the plastic put into use in 2017 went into other markets, including consumer products, electronics, buildings and transportation. In nearly all uses, increased coordination between material and product innovation and design and end-of-life recovery and recycling are needed. Alignment of technology, policy and market drivers will be necessary to reduce plastic waste and improve the circularity of plastic materials.
A mess of plastic
It is not clear what strategies will be most effective in mitigating harm from the global problem of plastic pollution. Borrelle et al. and Lau et al. discuss possible solutions and their impacts. Both groups found that substantial reductions in plastic-waste generation can be made in the coming decades with immediate, concerted, and vigorous action, but even in the best case scenario, huge quantities of plastic will still accumulate in the environment.
Science , this issue p. 1515 , p. 1455
Electronics are produced, consumed and disposed of through a highly complex, globalised value chain, creating numerous challenges in the governance of sustainable electronics. To understand how sustainability is governed throughout the electronics value chain, this paper uses current literature to analyse the structure (e.g. actors) and composition (e.g. policy instruments) within electronics governance. These articles are then used to derive explanatory factors for the level of governance effectiveness in terms of sustainability outcomes across the electronics lifecycle. Conclusions show that state and corporate forms of governance have the most impact on sustainability. However, interactive mechanisms for sustainability governance which incorporate governments, companies, and civil society organisations can build trust and cooperation between actors. Moreover, incorporating various actors in a complimentary manner can reinforce government and corporate approaches, as a result, interactive governance may yield long-term sustainability results in the electronics industry.
The Circular Economy (CE) movement is inspiring new governmental policies along with company strategies. This led to the emergence of a plethora of indicators to quantify the “circularity” of individual companies or products. Approaches behind these indicators builds mainly on two implicit assumptions. The first is that closing material loops at product level leads to improvements in material efficiency for the economy as a whole. The second assumption is that maximizing material circularity contributes to mitigate environmental impacts. We test these two assumptions at different scales with a case study on the circularity of PET in the USA market. The Material Circularity Indicator (MCI) reveals that closing the material loops at the product level increases material circularity in one brand and in the USA plastic bottle market but not in the USA PET market as a whole. Life Cycle Assessment (LCA) results reveal that increasing closed loop recycling of PET bottles is environmentally beneficial from product-level assessment scope. When expanding the scope to the whole PET market, recycling PET into film, fiber and sheet industrial sectors results being more material efficient and environmental preferable, unless the postconsumer reclamation rate is significantly improved. Thus, we demonstrate that adopting a systemic approach for CE assessment is essential ; instead of looking at one particular product and seeking the best circular case with respect to a specific material content, we suggest to looking at the whole set of products served by the specific material, and to seek the best material market-wide circular case.
Polyethylene (PE) is one of the most common types of plastic. Whilst an increasing share of post-consumer plastic waste from Europe is collected for recycling, 46% of separated PE waste is exported outside of the source country (including intra-EU trade). The fate of this exported European plastic is not well known. This study integrated data on PE waste flows in 2017 from UN Comtrade, an open repository providing detailed international trade data, with best available information on waste management in destination countries, to model the fate of PE exported for recycling from Europe (EU-28, Norway and Switzerland) into: recycled high-density PE (HDPE) and low-density PE (LDPE) resins, “landfill”, incineration and ocean debris. Data uncertainty was reflected in three scenarios representing high, low and average recovery efficiency factors in material recovery facilities and reprocessing facilities, and different ocean debris fate factors. The fates of exported PE were then linked back to the individual European countries of export. Our study estimated that 83,187 Mg (tonnes) (range: 32,115–180,558 Mg), or 3% (1–7%) of exported European PE in 2017 ended up in the ocean, indicating an important and hitherto undocumented pathway of plastic debris entering the oceans. The countries with the greatest percentage of exported PE ending up as recycled HDPE or LDPE were Luxembourg and Switzerland (90% recycled for all scenarios), whilst the country with the lowest share of exported PE being recycled was the United Kingdom (59–80%, average 69% recycled). The results showed strong, significant positive relationships between the percentage of PE exported out of Europe and the percentage of exports which potentially end up as ocean debris. Export countries may not be the ultimate countries of origin owing to complex intra-EU trade in PE waste. Although somewhat uncertain, these mass flows provide pertinent new evidence on the efficacy and risks of current plastic waste management practices pertinent to emerging regulations around trade in plastic waste, and to the development of a more circular economy.
This study reviews the scientific literature for business models contributing to sustainable plastic management and suggests avenues for future research. We define sustainable plastic management (SPM) as any technique along the waste hierarchy seeking to minimize the environmental damage of plastic material. Limited cases were found during the literature review, whereas many more SPM business models exist in practice, signaling a research gap. Forty-four scientifically documented business models were identified and analyzed on the basis of business model component, sustainability, level of waste hierarchy and sustainable business model archetype. Our results suggest that business models focus on recycling and creating value from waste, as well as the development of bioplastic. Few cases qualified as triple bottom line businesses, as many reported environmental and economic, but not social, benefits. Circular economy business models were found in a quarter of all cases. Finally, we present a synthesis of the barriers and opportunities for sustainable plastic management by the private sector. Drivers include maintaining competitive advantage, accessing green customers, collaboration with stakeholders, and achieving efficiency improvements. Barriers frequently mentioned were high costs, complexity of new systems, supply chain lock-in and low customer buy-in. Further research should expand the scale of SPM research, identify the enabling conditions for sustainable plastic management, and determine environmental impact.
Transition studies has recently underscored the need to focus on upscaling and diffusion of innovations. A key question is how these innovations, already existing in niche markets, can become diffused and embedded in broader markets. As a first step, we offer ideas about the design and formation of what one might call ‘markets for transitions’. We argue that less attention has been paid to legitimized perceptions of market boundaries, the roles of actors, the interplay between markets, and the process character of market formation.
Governments across the world aim to accelerate the transition to a circular economy. A pressing question is to what extent and how they can influence transformative change, especially since a circular economy also inherently conflicts with norms underlying existing policies and regulations. Existing circular economy governance literature provide lists of barriers and develop targeted interventions without analyzing underlying mechanisms. This paper bridges this gap by presenting a coherent conceptual framework of continuous transformative change through accumulating small wins. Examples from Dutch Circular Economy Transition Program illustrate the arguments. Small wins are characterized by concrete results in terms of in-depth changes of moderate importance. In the long run, these small wins can amplify and accumulate into transformative change through non-linear mechanisms such as energizing, learning by doing, the logic of attraction, the bandwagon effect, coupling, and robustness. The related governance framework consists of three groups of interventions: 1) setting a provocative ambition; 2) identifying and appreciating small wins; 3) activating mechanisms through which smalls wins can accumulate in transformative change. The small-wins perspective embraces ambiguity, cherishes emerging change, replaces linear governance models by circular systems thinking, and provides insights about how small wins accumulate. First observations indicate that, although the small-wins perspective intuitively makes sense to governance actors, it clashes with the rather unrealistic expectations about governing transitions in rapid, radical, and top-down/linear ways. Hence, governing the acceleration of a linear to a circular economy, requires the transformation of the linearly organized governance system itself.
In this framing paper for the special issue, we map significant research on global production networks during the past decade in economic geography and adjacent fields. In line with the core aim of the special issue to push for new conceptual advances, the paper focuses on the central elements of GPN theory to showcase recent rethinking related to the delimiting of global production networks, underlying political-economic drivers, actor-specific strategies and regional/national development outcomes. We suggest that the analytical purchase of this recent work is greater in research that has continued to keep a tight focus on the causal links between the organizational configurations of global production networks and uneven development. Concomitantly, considerable effort in the literature has gone into expanding the remit of GPN research in different directions, and we thus engage with five domains or 'constituent outsides' that relate to the state, finance, labour, environment and development. We believe such cross-domain fertilisation can help realize GPN 2.0's potential for explaining uneven development in an interconnected world economy.
The domain of transition studies has been drawing more and more scholarly attention and, as a result, its body of knowledge is rapidly growing. This raises new challenges as well as opportunities, not the least regarding the methodological and philosophical underpinnings of research in this domain. In this respect, transition research, as a relatively young field of inquiry, has been little concerned with methodological investigation and reflection. We propose a framework that enables this reflection: the so-called 'transition research onion'. Subsequently, we utilize this framework to systematically assess 217 peer-reviewed papers in the field of transition studies, to distill key methodological patterns and trends of the field. The findings suggest that the methodology of transition studies, in terms of depth and diversity, is underdeveloped. These insights serve to guide future research on transition processes.
Transitions are hardly conceivable without understanding how new markets are formed. However, there is still an incipient conceptualization of market formation in the context of transformation and transformative policy. Drawing on existing perspectives of market formation in economics of innovation, sociology of markets and marketing studies literature, this paper develops a framework for characterizing, differentiating and analyzing new market formation processes. We use three case studies to demonstrate how the framework is able to capture the dynamic and interconnected nature of market formation. The market formation framework serves to diagnose potential misalignments, bottlenecks and failures, to identify entry points for policy to intervene in market formation and support transformative innovation.
Although plastic is one of the most commonly used materials in our everyday life, the current linear economy (‘produce, use and dispose’) engenders high risks to human health in relation to greenhouse gas (GHG) emissions and environmental pollution. As a response to these challenges, the circular plastic economy is gaining momentum, where the goal is to reduce, reuse and recycle all plastic. The transition to the circular economy should be made across the entire plastics value chain in order to ensure circular design, production, use and waste management. This study examines the current scientific literature in relation to the entire value chain of plastics. This aim of the article is to provide an overview of the existing research (and highlight research gaps) associated with the transition of plastic use to a circular model. The literature was divided into the following categories: 1) design; 2) production; 3) use; 4) end-of-life; and 5) value chain. A high proportion of the literature was found to address the end-of-life phase, suggesting that the other phases are currently neglected. The results have implications that are applicable to multiple phases; in particular, contamination of waste streams and composite materials places significant limitations on the opportunity to recycle and reuse plastic in new products. This calls for changes in the whole value chain, and for trans-sectorial collaboration to ensure systemic transparency. Therefore, future research should take a holistic approach to the transition to circular through careful mapping of implications, stakeholder involvement and collaboration.
Classic accounts of transitions research have predominantly built on reconstructions of historical transition processes and in-depth case studies to identify and conceptualize socio-technical change. While such approaches have substantively improved our understanding of transitions, they often suffer from methodological nationalism and a lack of generalizability beyond spatial and sectoral boundaries. To address this gap, we propose a novel methodology – socio-technical configuration analysis (STCA) – to map and measure socio-technical alignment processes across time and space. STCA provides a configurational and dynamic perspective on how social and technical elements get aligned into “configurations that work”, allowing for the identification of differentiated transition trajectories at and across spatial and sectoral contexts. The methodology's value is illustrated with the empirical case of an ongoing shift from centralized to more modular infrastructure configurations in the global water sector. Building on this illustration, we outline potential contributions of STCA to configurational theorizing in transition studies, sketching the contours of what we believe could become a generative epistemological approach for this field.
The concept of a Circular Economy (CE) stands out as a holistic approach to mitigate the detrimental effects of traditionally linear economies. However, the transition towards circular systems of production and consumption does not happen automatically. While barriers are often analyzed in isolation and assumed to be equally relevant in an industry, this article focuses on the interrelation of regulatory with other barriers and explores disagreements between different actors in a value chain. By taking a value chain perspective on the case of recycling in flexible packaging, we highlight how regulatory barriers are affected by economic and technical barriers. We also find that different value chain players have divergent views on how best to remove current (regulatory) barriers. We term the subjects of such disagreement “contested solutions.” Researchers aiming to inform policy-making should consider such contested solutions, ideally by extending their barrier analyses accordingly.
An increasing number of companies are voluntarily committing to help complete the transition from a linear to a circular economy, thereby curbing the global environmental pollution caused by plastics. The various endeavours are codified both by signing global commitments, like the New Plastics Economy Global Commitment, and by incorporating individual plastic strategies in sustainability reports. However, a critical analysis of whether these voluntary commitments can mitigate the plastic crisis and shape the transformation towards a circular economy is lacking. This paper qualitatively analyzes the self-commitments of ten international consumer goods manufacturers and reconstructs their understanding of the circular economy concept itself as well as the related key concepts: reduction, reuse, and recycling (3Rs). It can be demonstrated that a uniform definition of the 3Rs is missing and that the concepts of reduction and reuse are mostly associated with recycling. As this prevents the rigorous implementation of a circular economy from the outset, commitments must be strictly evaluated based on unambiguous definitions and this is currently not being done.
This study aims at defining the current state-of-affairs of the German post-consumer plastic packaging (PCPP) sector. By the use of the Material Flow Analysis (MFA) tool, a comprehensive investigation of the currently available PCPP waste collection and treatment system is conducted, which enables understanding the intrinsic inefficiencies of the waste value chain. The analysis utilises primary data (by conducting manual sorting activities) as well as secondary data (literature-based). Sorting has been performed taking into consideration the plastic packaging applications and material composition, polymer types, and moisture and dirt.
Results show that the per capita generation of PCPP waste is 26.3 kg ± 3.0% in the year 2017 in Germany. The separate collection efficiency is 74.8% ± 2.9%, considering all separate collection systems (i.e. deposit system for PET bottles and Dual System). The study confirms that most of the material losses occur at the sorting stage mostly as a result of the complex packaging designs, where a combination of different materials is common practise. Overall, the net material recycling rate is 26.4% ± 1.3%, calculated on the basis of the net generated waste and excluding the potential recycling of the mixed polyolefin stream. If recycled material from mixed polyolefins is included, this figure increases to 37.8% ± 2.0%.
The maximisation of the PCPP re-circulation potential requires collaborative policies addressing all the stakeholders in the value chain, starting from producers (product design), followed by the consumer (responsible and correct disposal), then the sorting facilities (by utilising state-of-the-art technologies and targeted sorting).
Polyethylene terephthalate (PET) is a widely used plastic material that may cause significant environmental pollution. China is a major global producer and consumer of PET. Previous studies have focused on the effects of toxic elements from PET (e.g., antimony leached from PET products) on the environment. However, detailed information about PET, particularly about the PET production, trade, use, and recycling in China, is limited. This study developed a network model of PET flows in China, including the production, market trade, manufacturing and use, and waste management and recycling stages. Based on this network model, the characteristics of PET flows during three periods of development for the PET industry were analyzed. The results show that the fiber and bottle manufacturing industries are the industries with the largest PET in-use stocks. The PET flows showed different characteristics in the terms of waste import, recycling, and disposal (mechanical recycling, chemical recycling, incineration, landfill, and discarding) in the different periods of PET industrial development. Notably, the amount of discarded PET was significant, and the treatment of waste PET would probably be a challenge in the future. Policies for improving the PET cycling system were provided on the basis of the study results to promote the management and sustainable utilization of PET materials.
Purpose
This paper aims to examine the current status and trends in circular economy (CE) research. The state of CE research is assessed by critically examining the field by considering diverse dimensions.
Design/methodology/approach
The systematic literature review (SLR) of CE research articles is analyzed using the content analysis methodology. The articles are selected from the Scopus database containing the keyword “Circular economy” in its title, abstract and keywords. In total, 587 research articles published on CE in various reputed peer-reviewed journals over 15 years (2005–2020) are selected for review.
Findings
The research in the domain of CE is in the beginning phase. It has numerous quantitative modeling opportunities, value creation and propositions aspects and application in real-life case problems. One of the significant findings is that the CE research field is more inclined toward the implication of the empirical qualitative research. The identified research gaps and future opportunities could provide further direction to broaden CE research.
Research limitations/implications
The review focuses on publications published in peer-reviewed journals in the English language only. It restricts the recognition of relevant articles published in conference proceedings and languages other than English.
Originality/value
This research study will provide a deeper understanding of CE research's existing status and highlights the research trends, gap and its applicability in real-life case problems and setting up future research directions in the CE field.
Rivers are a major pathway for the transport of plastics into the ocean. Plastic pollution capture devices offer one way to reduce the accumulation of plastic in the environment. This paper provides a framework for selecting a device to reduce plastic pollution in freshwater, synthesizing information of forty prevailing plastic pollution capture devices. We distinguish three major components of plastic pollution technology (booms, receptacles, and watercraft vehicles) and collect details on each technology including its features, limitations, efficiency, reported costs, and maintenance requirements. A framework is developed to aid in device selection by water and waste managers, which highlights the need for a watershed assessment, an understanding of site conditions, the attainment of community buy-in, and a long-term maintenance plan. While plastic pollution capture devices can help reduce the flux of plastic waste from freshwater, management of plastic waste at the source is also needed to ultimately clean our oceans and waterways.
Shortcomings in manufacturing companies’ capabilities to execute circular economy business modelling have delayed a broader dissemination of circular business models beyond the stage of pilot projects in niche markets. Circular economy poses additional uncertainties for innovation that are not common for manufacturing companies’ traditional activities and business as usual. To cope with such challenges, they lack systematised practices and proactive advice, which are scant in available literature and approaches. The paper presents the development of the tool Circular Economy Business Modelling Expert System within manufacturing companies, intended to address these limitations. Based on systematised business modelling practices for circular economy and proactive advice on potential circular business model configurations, the expert system enhances strategic thinking for circular economy, supporting companies to come up with varied alternative business models with reasonable and viable value propositions to deploy circular benefits accordingly. The expert system was streamlined based on literature review, development, testing and evaluation with 12 practitioners from 10 companies. The paper discusses the main functionalities of the expert system and the results of its application into varied manufacturing companies. The application of the expert system has demonstrated to benefit companies with: inspiration for best practices on circular business modelling, a structured framework for confirming assumptions and a logic structure that prompts decision-making and reduces uncertainties.
Despite high estimated gains of a circular economy implementation, progress on the macro, meso and micro level is sluggish. The purpose of this paper is to examine, from a theoretical economics perspective, how four barriers – technological, market, institutional and cultural – can prevent the implementation of a circular economy. The barriers that currently hinder a circular economy from developing are identified and a mapping of these barriers is performed to understand how they are interdependent and entangled. The conclusion is that even small barriers could stop the emergence of a circular economy. Even though a circular economy is different from our traditional “linear” economy, the theoretical analysis in this paper gives no reason to believe that a circular economy will not follow the same rules as a traditional economy. There will be property rights, rule of law and price signals guiding the economy. If some of the essential parts of a market are lacking, a weaker circular economy than otherwise possible will materialize.
Plastic pollution, especially in marine environments, is a global problem that is currently inadequately managed. Solutions for marine plastic can occur through policy, behavior change and infrastructure improvements, but also through entrepreneurial ventures and technological innovations. Currently, information about these ventures and innovations is scattered and lacks coherence. This study presents the first comprehensive overview of entrepreneurial and SME led solutions for marine plastic by analyzing a database of 105 SMEs categorized into four functions: prevention, collection, transformation and monitoring. We find that small businesses are successfully commercializing goods and services to reduce the damage of plastics on the marine environment through innovative business models, with a steep growth of startups founded between 2016 and 2019. However, efforts to manage marine plastic are still underdeveloped in many areas, including microplastic management and monitoring. Practitioners, policymakers and researchers can utilize the database to identify solutions, best practices, synergies and avenues for further research, such as quantifying the environmental impacts of this industry.
This paper contributes to understanding the international trade of plastic scrap. This is done by structuring trade data in networks, and calculating network centrality indexes for countries engaged in plastic scrap trade, as well as for sub-types of plastic polymers (Ethylene, PVC, and Styrene). Network measurements allow insights on plastic scrap flows, as they identify important countries which concentrate material flows at scale, useful for technology dissemination, recycling infrastructure deployment, as well for standard-setting and negotiations. Network measurements based on 2018 data show the key role of EU and North American countries in the global plastic scrap trade network, with strong links to a few Asian countries. Developing regions such as South America, Africa, and Eurasia displayed discreet roles in the networks analyzed, indicating the need for more research on underreporting or other factors behind this apparent underrepresentation.
Soaring consumption of plastic products globally generates vast amount of plastic wastes, which has been a grand challenge for today's solid waste management system. China has been the world largest importer of plastic wastes for the last three decades. However, due to growing environmental awareness, China decided to stop importing plastic wastes in 2017. This study analyzes the historical evolution of the international plastic wastes trade by using complex network analysis method and shows that China's management policies are the main driving forces to the expansion and shrinkage of the global plastic wastes trade network. We find that the trade network grew most tremendously during mid-1990s to early 2010s. The global total trade volume increased from 0.9 million tons in 1992 to 16.4 million tons in 2012, and the number of trade connections increased from 452 to 2248 during the same period. 2%-6% of the trade relations contributed more than 80% of the global total trade volumes. Trade flows among continents or sub-continental regions increased from 38% to 64% during 1997-2012, indicating longer transport distances and spatially more separated trade partners in the network. Results also show that the growth trend stagnated and the network became multipolar again after 2012, when China launched a series of campaigns to strengthen regulations on solid wastes import. China's import ban on plastic wastes issued in 2017 led to a dramatic decline of trade volumes. More and more stringent environmental protection measures in China and other developing countries are transforming the geographic pattern of global waste trade network and may drive developed countries to reconstruct their recycling systems.
Mismanaged plastic waste is transported via rivers or city drains into the ocean where it accumulates in coastal sediments, ocean gyres and the deep ocean. Plastic harms marine biota and may ultimately return to humans via the food chain. Private initiatives proposing to collect plastic from the sea and rivers have gained widespread attention, especially in the media. However, few of these methods are proven concepts and it remains unclear how effective they are. Here we estimate the amount of plastic in the global surface ocean to assess the long-term legacy of plastic mass production, calculate the time required to clean up the oceans with river barriers and clean up devices, and explore the fate of collected plastic waste. We find that the projected impact of both single and multiple clean up devices is very modest. A significant reduction of plastic debris in the ocean can be only achieved with collection at rivers or with a combination of river barriers and clean up devices. We also show that the incineration and production of plastic has a significant long-term effect on the global atmospheric carbon budget. We conclude that a combination of reduced plastic emissions and reinforced collection is the only way to rid the ocean of plastic waste.
Material efficiency measures, such as recycling rates, are often used to set circular economy targets to achieve higher resource efficiency and lower environmental impact. The aim of this study was to identify material efficiency indicators suitable to reflect the environmental performance of waste and recycling systems using PET bottle waste management in three European countries with diverse waste management structures and recycling performance levels. Material flow analysis and life cycle assessment were performed to assess the material efficiency and environmental impacts of each system as a basis to analyze the relation between these two dimensions. PET bottle waste generation was 5.4 kg/person and year (pa) in Austria in 2013, 6.0 kg/pa in Germany in 2017 and 6.9 kg/pa in Serbia in 2015. Out of this waste flow 41%, 91%, and 11% were directed into PET recyclate in Austria, Germany and Serbia, respectively. For all systems, higher material efficiency translated into lower environmental impact and vice versa. However, linear regression analysis between different material efficiency indicators and environmental impacts showed that indicators targeted at actual recycling, specifically at closed loop, were better suited to reflect environmental performance than input-based indicators. Therefore, whenever data are available, output-based quality-related indicators should be used to measure the material efficiency of waste and resource systems because they correlate best with the goals of increasing resource efficiency and decreasing environmental impacts.
This review assesses the state-of-the-art in comparative Life Cycle Assessment of fossil-based and bio-based polymers. Published assessments are critically reviewed and compared to the European Union Product Environmental Footprint (EU PEF) standards. No published articles were found to fully meet the standards, but the critical review method was used to classify the articles by their level of compliance. 25 articles partially met the PEF standards, giving 39 fossil-based and 50 bio-based polymer case results. Ultimately, it was possible to compare seven bio-based polymers and seven fossil-based polymers across seven impact categories (energy use, ecotoxicity, acidification, eutrophication, climate change, particulate matter formation and ozone depletion). Significant variation was found between polymer types and between fossil-based and bio-based polymers, meaning it was not possible to conclusively declare any polymer type as having the least environmental impact in any category. Significant variation was also seen between different studies of the same polymer, for both fossil-based and bio-based polymers. In some cases this variation was of the order of 400%. Results suggest that a large part of this variation is related to the Life Cycle Assessment methodologies applied, particularly in the end-of-life treatment, the use of credits for absorbed Carbon Dioxide, and the allocation of multifunctional process impacts. The feedstock source and processing method assumed for bio-based polymers was also a major sources of variation. The challenges of Life Cycle Assessment, particularly in a complex, geographically diverse and young industry like bio-based polymers, are recognised. It is proposed that the PEF standards should be adopted more widely in order to homogenise the methods used and allow meaningful comparison between LCA studies on fossil-based and bio-based polymers, and between studies of the same polymers.
The circular economy is receiving increasing attention as having the potential to break with the current linear economy of unsustainable production and consumption. A circular economy promotes system innovations that aim to design out waste, increase resource-efficiency, and achieve a better balance between economy, environment and society. Ensuring a successful transition to a circular economy requires the ability to measure and report on progress. Currently, there are three levels of indicators for measuring circular economy: macro (global, national, regional, city), meso (industrial symbiosis, eco-industrial parks), and micro (single firm, product). A detailed understanding of how to measure and document progress towards a circular economy is lacking, especially on a micro level. This is a barrier for both producers who want to provide circular products and services, and for the consumers who want to know how to compare products. This paper helps to open the black box, not by developing a method for measurement, but by categorizing and assessing what is already being done. This paper reviews 30 indicators of a circular economy at the micro level, where the majority of indicators focused on recycling, end-of-life management or remanufacturing, while fewer indicators consider disassembly, lifetime extension, waste management, resource-efficiency or reuse, and the majority of the papers are published in the last few years. There is no commonly accepted way of measuring circular economy in general at the micro level, nor within the different circular economy principles of recycling, remanufacturing etc. As circular economy often is presented as a means to a sustainable development, the alignment between the three dimensions of sustainability and the reviewed indicators is analyzed, which showed that the majority of indicators focus on economic aspects, with environmental and especially social aspects included to a lesser extent. This biased approach to circular economy that favors economic aspects over environmental and social impacts can lead to sub-optimizations when companies apply circular economy and may lead to a narrower approach to sustainability than what has previously been the case. For future research it can be interesting to explore if the same bias exists on meso and macro level, but also to analyze how a more coherent approach can be standardized on micro level.
In 2017, over 320 million tons of polymers, excluding fibers, were manufactured across the globe. The excessive amounts of plastics produced today pose a threat to both man and nature. Urgent approaches towards reducing plastic consumption and increasing its recyclability are needed. This paper discusses the matter of accelerating the circularity of plastic-based material systems. It investigates a sample of plastics-converting companies in Emilia Romagna region (Italy), which stand out for radical innovations in business models, with the aim to catalyse changes in current manufacturing practices. The findings provide empirical support for a positive relationship between business strategies and the use of non-virgin plastic materials. The innovative value of this paper relies on the fact that it elaborates on the vision established within the European Strategy for Plastics in a Circular Economy that sets ambitious targets about achieving high plastic recycling targets by 2025. Legislative, economic, technological and social barriers can only be tackled by radically revising the current philosophy of designing, producing, distributing and consuming plastic as part of goods and services. A systemic thinking perspective is an essential building block in this context: moving from a micro to a meso-scale analysis can represent a useful means supporting the creation of viable management approaches towards achieving environmental and economic gains, especially in European plastic conversion industry, where SMEs are the majority (about 50000). Thanks to its analysis and scope, this paper provides useful insights to the plastic industry: it shows that this substantial improvements in this sector will require innovative solutions and major efforts by key decision makers, producers, recyclers, manufacturer, retailers as well as consumers.
Since many years, companies are trying to cope with impressive technological growth rates, severe environmental issues and even more restrictive national and international directives. However, innovative Business Models (BMs) and industrial strategies adequate to this new context are still either under development or implementation. To this aim, the article proposes a systematic literature review on existing Circular Business Models (CBMs) and their classification methods, by selecting the most promising ones. A total amount of 283 articles related with CBMs has been assessed into detail, by identifying: 5 archetypes, 9 classification methods, 5 adoption-oriented challenges, 4 decision-support tools and 3 additional research areas. Key findings demonstrate that: i) Product-Service Systems (PSSs)-oriented and Reuse, Remanufacturing and Recycling (3R)-based CBMs are the most common archetypes, ii) Business Model Canvas is the most diffused classification framework, iii) sustainability and company-based challenges are the most discussed by the experts and iv) sustainability check-oriented is the most common type of decision-support tools. These (and others) results could support both companies, researchers and governments in updating the current knowledge on CBMs and make them adoptable for practitioners from different industrial contexts.
The aim of current European Union waste management directives is to promote prevention of waste and the application of a waste management hierarchy: preparing for reuse, recycling, other recovery, and disposal. The Waste Framework Directive only measures the waste operations recycling, incineration, and landfill individually, not measuring the implementation of the waste hierarchy principle in Member States of the European Union. The present study proposes a waste hierarchy index (WHI) to measure the waste hierarchy within a circular economy context, applied to municipal solid waste. In developing the WHI, recycling and preparing for reuse, as defined by Eurostat, were considered as positive contributors to the circular economy, and incineration and landfill as negative contributors. The WHI was applied at different geographic scales (local and national levels) to verify its potential and limitations. The WHI is a direct and concise indicator that provides a holistic perspective on how waste is being managed. The WHI is more than a source of waste statistics; it is the beginning of a real discussion about how waste statistics should be managed to reach a circular economy through the implementation of waste hierarchy.
This paper discusses a method for the identification of leverage points for the transformation of complex economic systems by combining value chain analysis and a relational perspective on markets. We introduce the Network of Markets Approach and show that it is central in bridging the two concepts and apply social network analysis in order to do so. The case of the German bioeconomy, the transition from a fossil to a bio-based economy, is chosen to exemplify the application of the method. Here, we provide the specific rationales behind our approach and identify possible key markets for governance interventions in the transformation toward a bio-based economy in Germany.