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POLICY BRIEF article

Front. Environ. Sci., 22 July 2020
Sec. Toxicology, Pollution and the Environment
This article is part of the Research Topic Microplastics in the Marine Environment: Sources, Distribution, Biological Effects and Socio-Economic Impacts View all 24 articles

Transnational Plastics: An Australian Case for Global Action

  • 1Australian Institute of Marine Science, Crawley, WA, Australia
  • 2The Modelling House, Raglan, New Zealand
  • 3The Ocean Cleanup Foundation, Delft, Netherlands
  • 4UWA Law School, The University of Western Australia, Perth, WA, Australia
  • 5UWA Oceans Institute, The University of Western Australia, Perth, WA, Australia

Mitigating plastic pollution requires strong international cooperation because significant volumes of plastic waste are transported across jurisdictions both as waste exports and drifting ocean plastics (OP). Here we estimate which nations are (1) sources for overseas OP reaching Australian waters and (2) destinations receiving OP from Australian sources. We then provide actionable recommendations for mitigating plastic pollution in Australian waters and beyond. We estimated that the vast majority of overseas OP reaching Australia is from Indonesia, and that most of the Australian-sourced OP reaching overseas territories is entering New Zealand. Key actions for mitigating the OP issue in Australia include better governance, upgraded enforcement, and increased investments to reduce fossil fuel-based plastic production and to drastically improve both domestic and international waste management infrastructure and operations.

Introduction

Plastic pollution is a global environmental concern due to its widespread damage to ecosystems, economies, and human well-being. Under a “business as usual” scenario, plastic impacts will keep increasing as both the production and mismanagement rates of these materials are high and rising. Globally, we are currently producing ∼380 million tons of plastic per year, with just 9% of it being recycled; the rest is burned, landfilled, or dumped in the environment (Geyer et al., 2017). Notoriously, around 40% of the plastics we produce are used for packaging that becomes waste immediately after its single use, contributing to more than 60% of global beach litter (Schweitzer et al., 2018). Currently, more than 15 million tons of plastic enter oceans each year (Forrest et al., 2019). Plastics of all kinds—from microscopic packaging fragments to giant fishing nets—have accumulated in many marine ecosystems, including beaches (Lavers and Bond, 2017), coastal and oceanic waters (Ryan, 2013; Lebreton et al., 2018), marine canyons (Schlining et al., 2013), coral reefs (Lamb et al., 2018), mangroves (Martin et al., 2019), and even sea ice (Peeken et al., 2018). Pronounced marine plastic pollution impacts include the often lethal consequences of entanglement and ingestion interactions between ocean plastics (OP) and marine wildlife (Vegter et al., 2014). Other more subtle OP implications include transport of invasive species across ocean basins (Barnes, 2002) and release of persistent bioaccumulative toxic (PBTs) chemicals into environments and organisms, with the potential bioaccumulation of plastic-associated PBTs up food webs that include humans as seafood consumers (Setälä et al., 2014; Rochman et al., 2015; Chen et al., 2018). Aside from impacting oceans, plastics are also causing significant damage during their upstream lifecycle. The vast majority of today’s plastics are made of fossil fuels (∼99%) and the release of greenhouse gases during their production and incineration is costing around US$ 700 billion per year to the global economy (Forrest et al., 2019). Additional damage is created by the release of toxic chemicals from plastics to air, soil and water resources (UNEP, 2014) as well as human exposure to plastic particles and additives linked to cancer, obesity, diabetes, and endocrine system disorders (Brophy et al., 2012; DeMatteo et al., 2013; Manikkam et al., 2013; Lehner et al., 2019).

To solve plastic pollution, countries around the world need better governance at the municipal (e.g., Cohen et al., 2015), national (e.g., Commonwealth of Australia, 2018a), regional (e.g., European Commission, 2019), and international levels (Borrelle et al., 2017; Weikard, 2019). The last of these is particularly complex but essential given the transboundary nature of plastic contamination, particularly as wide OP dispersal (Lebreton et al., 2012) and waste trade (Brooks et al., 2018) (Table 1). Most of the global plastic waste is generated by high-income countries (HICs), where per capita plastic consumption is particularly high (Hoornweg and Bhada-Tata, 2012). As recycling is a low margin business, the majority of HICs plastic waste intended for recycling is exported to lower income “East Asia and Pacific” nations with low labor costs (Locock, 2017). Australia is a classic example of a HIC “plastic waste exporter” as it ships large volumes of plastic waste to low- to middle-income countries (LMICs). In 2018 alone, Australia exported ∼127,400 tons of plastic waste (UN Trade Statistics, 2018; code 3915 “waste, parings and scrap of plastics”), the majority of which was exported to Malaysia (35%), Indonesia (22%), and Thailand (18%; Figure 1). Historically, plastic waste trade has been associated with serious environmental and social issues, including export of low-quality plastic bales by HICs and illegal practices for processing imported materials by LMICs, including labor exploitation, burning, and discard of low-value plastic waste into dumps, rivers, and oceans (GAIA, 2019; Sarpong, 2020). A significant disruption to global plastic waste trade occurred in 2017, when China banned the import of large volumes of plastic waste into its territory (Liu et al., 2018; Walker, 2018) and neighboring LMICs started receiving this rejected waste (Wang et al., 2019). These LMICs lack the infrastructure to manage their own plastic waste, let alone a rapid increase in plastic waste supplied by HICs. The international plastic waste crisis is now quite evident, with waste-importing countries such as Malaysia and Indonesia starting to ship contaminated plastic waste back to its HICs sources (CNN, 2019; Walden and Renaldi, 2019). Without improved plastic waste governance, there is a risk that increasing quantities will ultimately become plastic pollution.

TABLE 1
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Table 1. Top five nations with the highest mass of plastic waste exported (“Top Exporters”) and leaked to oceans (“Top Emitters”).

FIGURE 1
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Figure 1. Countries identified as destinations for plastic waste exported by Australia in 2018 (UN Trade Statistics, 2018). The map indicates countries receiving Australian plastic waste, with circle sizes proportional to amounts exported in 2018. Top Australian waste importers are (1) Malaysia, (2) Indonesia, (3) Thailand, (4) Hong Kong, (5) Samoa, (6) Viet Nam, (7) Taiwan, and (8) Republic of Korea. Histogram shows the proportion of exported Australian plastic waste reaching its major destinations in 2018. Image shows mismanagement of Australian waste (i.e., burning of low-value plastics) in Surabaya, Indonesia. Image source: Ecoton—http://ecoton.or.id/en/home/.

Plastic waste is not only exchanged between nations via trade. Once leaked into rivers and oceans, it can be transported by currents, winds, and waves, often polluting other nations’ exclusive economic zones (EEZs) (Lavers and Bond, 2017; Lebreton et al., 2017). It is quite difficult to track OP back to sources, with the degree of difficulty increasing over time as OP items undergo environmental weathering and fragmentation into progressively smaller pieces known as microplastics when <5 mm and nanoplastics when <0.1 μm (Gigault et al., 2018). Previous studies attempting to quantify OP connectivity dynamics have utilized 2D numerical models forced by sea surface current velocity fields to simulate OP transport at different scales (Lebreton et al., 2012; Eriksen et al., 2014; Critchell and Lambrechts, 2016). To the best of our knowledge, there are no studies to date attempting to quantify fluxes of OP between nations. This information is key to better inform stakeholders involved in designing cost-effective strategies for decreasing OP pollution. In this policy brief, we used ocean modeling to estimate which nations are (1) sources for overseas OP reaching Australian waters and (2) destinations receiving OP of Australian origin. Using our findings and incorporating an extensive literature review, we then describe governance and policy recommendations for mitigating plastic pollution in Australia and beyond.

Origin and Destinations of Ocean Plastics Crossing the Australian EEZ

We used a Lagrangian model that simulated inputs and surface transport of OP in the world’s oceans (Lebreton et al., 2012) to estimate connectivity between the Australian EEZ and other world countries’ EEZs. Our analysis indicated that the vast majority of overseas OP reaching the Australian EEZ is coming from Indonesia (∼70.5%; Figure 2), followed by Fiji (∼8%), Vanuatu (∼4%), Papua New Guinea (∼3%), Philippines (∼2.5%), Vietnam (∼2.5%), East Timor (∼2%), South Africa (∼2%), China (∼1.5%), Malaysia (∼1%), Solomon Islands (1%), and other minor contributions (∼3%) from 19 nations: Sri Lanka, Thailand, Samoa, Maldives, Tanzania, Comoro Islands, New Zealand, Myanmar, Mozambique, Peru, Mauritius, Singapore, Pakistan, Kenya, Madagascar, and Ecuador. In relation to Australian-sourced OP reaching overseas EEZs, we predicted that ∼78% is entering New Zealand waters, with the remaining reaching the EEZs of New Caledonia (∼17.5%), Fiji (∼4%), and Vanuatu (∼1%).

FIGURE 2
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Figure 2. Countries identified as sources (pink) and destinations (blue) for ocean plastics (OP) crossing the Australian Economic Exclusive Zone (EEZ) boundary. The map indicates country locations, with circle sizes proportional to amounts of OP reaching the Australian EEZ (pink) or receiving Australian-based OP (blue). The Australian EEZ is highlighted in white. Top “source countries” are (1) Indonesia, (2) Fiji, (3) Vanuatu, (4) Papua New Guinea, (5) Philippines, (6) Vietnam, (7) East Timor, (8) South Africa, (9) China, (10) Malaysia, and (11) Solomon Islands. Ranking of “destination countries” is (1) New Zealand, (2) New Caledonia, (3) Fiji, and (4) Vanuatu. Histogram in the left shows the contributions of “source nations” for overseas OP reaching Australian waters. Histogram in the right shows the proportion of OP from Australian sources reaching “destination countries.”

Our model released “virtual OP” particles in the world’s EEZs at rates proportional to estimated volumes of mismanaged plastic waste per country (Jambeck et al., 2015) and derived their transport from sea surface current velocity fields sourced from the HYCOM + NCODA global reanalysis (Fox et al., 2002; Cummings, 2005; Cummings and Smedstad, 2013). For every day between 1993 and 2012, we documented the number of particles inside the Australian EEZ arriving from each foreign country as well as the number of particles of Australian origin inside the EEZ of every other country. We averaged the daily number of visits per emitting country over the total number of particles present in the model and over the full 20-year period. It is important to emphasize that our model considered an infinite lifetime for virtual OP particles floating at the sea surface. As a consequence, significant OP removal processes such as beaching (Olivelli et al., 2020) and sinking (Porter et al., 2018) were not accounted for. Nonetheless, we know that a proportion of floating OP is persistent enough to travel long distances (Lebreton et al., 2018). Therefore, assuming removal processes have similar magnitudes across countries of origin, our predictions of international OP connectivity are reasonable.

The occurrence of Indonesian-based plastics reaching the Australian EEZ and shorelines is in line with field observations (Reisser et al., 2013). Significant OP accumulation zones dominated by Indonesian-based debris from both on-land (e.g., mismanaged single-use packaging) and at-sea (e.g., dumped fishing nets) sources have been recorded in a range of Australian regions such as Gulf of Carpentaria (Wilcox et al., 2013; Dhimurru Aboriginal Corporation, 2018), Christmas Island (Lavers et al., 2020), Cocos Island (Lavers et al., 2019), and Ashmore Reef (Lavers et al., 2013; Figure 3). This is not surprising since the waters and shorelines of North West Australia, North Queensland, and Northern Territory are exposed to OP originated in Indonesia’s EEZ due to both geographic proximity and ocean hydrodynamics (Sprintall et al., 2019). The accumulation of OP in remote regions of Australia is quite concerning given ingestion and entanglement interactions with endangered marine wildlife (e.g., sea turtles; Wilcox et al., 2013), cross-boundary transport of pollutants and organisms (Reisser et al., 2014; Yeo et al., 2015; Lamb et al., 2018), damage to tourism, and remote clean-up costs (Commonwealth of Australia, 2018b).

FIGURE 3
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Figure 3. Examples of plastic pollution hotspots in Australia, dominated by Indonesian-based debris. Top right: Christmas Island waters (Image source: Tangaroa Blue); Top left: Cocos Island (Image source: University of Tasmania): Bottom left: Gulf of Carpentaria (Image source: Parley for the Oceans); Bottom right: Ashmore Reef (Image source: Minderoo Foundation).

Governance and Policy Recommendations

This study highlights the transboundary nature of a major issue associated with our broken “plastics economy”: persistent waste that creates high and ever-increasing levels of wide-spreading pollution. As of today, there are only a few global interventions dealing with specific plastic pollution issues (Table 2) and although the United Nations Convention on the Law of the Sea (UNCLOS, 2020) requires the adoption of laws and standards to prevent, reduce, and control land-based pollution, these have not yet eventuated (Article 207). The existing initiatives are quite fragmented and uncoordinated, with no overarching binding commitment to jointly tackle all facets of our transnational plastics crisis. Like others (Borrelle et al., 2017; Simon and Schulte, 2017; Haward, 2018; Raubenheimer and McIlgorm, 2018; Vince and Stoett, 2018; Tessnow-von Wysocki and Le Billon, 2019; Weikard, 2019; Raubenheimer and Urho, 2020), we believe it is important to create a new global convention that establishes a legally binding framework for global plastics governance. As suggested by Simon and Schulte (2017), the form of such convention should reflect both great ambition and political feasibility, as to ensure agreeability between and finally compliance by state parties. It could be built on five pillars: (1) a clear and binding goal to eliminate plastic contamination of water, food, air, land, and oceans; (2) strategic options for national implementation; (3) supporting mechanisms, with a strong multilateral financing component; (4) stringent monitoring, review, compliance, and enforcement processes; and (5) strong involvement of non-governmental stakeholders. To truly solve plastic pollution, we need better worldwide governance, compliance, enforcement, and investments both downstream, by improving waste management systems, and upstream, by decreasing production of fossil fuel-based plastics. The latter can be achieved by incentivizing the replacement of fossil fuel-based plastics with recycled content and/or renewable bio-benign polymers. Setting a “plastic price” that incorporates the external costs of plastic pollution into the price of fossil fuel-based plastics would certainly incentivize their replacement with renewable and/or recycled materials (Raubenheimer and McIlgorm, 2018). Non-binding business-led proposals for implementing a transnational “plastic price” based on a production levy (Forrest et al., 2019) and credit scheme (3R Initiative, 2020) have been made in the past, but so far with very little implementation traction. We encourage policymakers to consider the implementation of a similar, but legally binding, intervention; perhaps under a “Global Extended Producer Responsibility” scheme (Raubenheimer and Urho, 2020) and/or via the introduction of phased targets reducing international trade of fossil-fuel based plastics (Raubenheimer and McIlgorm, 2017).

TABLE 2
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Table 2. Examples of international initiatives to mitigate plastic pollution.

Mitigating plastic pollution in Australia and further afield also requires a systemic improvement to existing law, policy, and practice at the national level (Table 3). Australian government agencies and regulators need to move beyond the identification of barriers, capacity gaps, needs, and measures and start to scale implementation of state-of-the-art standards in waste segregation, collection, sorting, exports, composting, and recycling practices across its states and territories. While the country’s waste collection infrastructure and operations are of relatively high quality, its waste sorting, recycling, and composting operations require considerable improvement. Furthermore, efforts are needed to reduce production and consumption of virgin fossil fuel-based plastics, including incentivizing development and use of substitutes. We believe that key regulatory measures requiring prioritized implementation include:

TABLE 3
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Table 3. Examples of Australian national initiatives to mitigate plastic pollution.

– Creation of a national bin system that enables citizens to separate waste into standardized higher value material streams (Mühle et al., 2010);

– Use of advanced plastic sorting laser technologies in Material Recovery Facilities (MRFs) for production of higher quality polymer bales (Hopewell et al., 2009);

– Banning of unnecessary plastic items, hazardous additives, and polymers (World Economic Forum et al., 2016);

– Support to novel “reuse” business models (Ellen MacArthur Foundation, 2019);

– Investments in innovations to:

○ Switch from fossil fuel-based plastics to renewable and bio-benign alternatives (Zheng and Suh, 2019).

○ Redesign problematic items (e.g., multi-layered packaging, plastic films) to make their recycling or composting economically and technically possible;

○ Improve technologies able to turn plastic waste into food-grade recycled pellets (Pohjakallio and Vuorinen, 2020).

As demonstrated in this study, Australia is both an emitter and receiver of plastic pollution to/from neighboring countries. Therefore, it needs a robust international engagement strategy to complement current National Policies (e.g., Australian Government, 2019). If building responsible recycled plastic trade is deemed to be more beneficial than solely relying on isolated Australian-only operations, agreements involving transboundary deployments of technical and financial resources in waste management and recycling ecosystems should become major priorities. This would ensure regional-scale economic, social, and environmental targets are reached and associated risks minimized (Government of Indonesia, 2017; ASEAN, 2020; DFAT, 2020). Of paramount importance here is for Australia to be accountable for the quality and appropriate management of shipped waste by the receiving entities. This could be effectively implemented via the application of traceability technologies (e.g., Blockchain) enabling tracking of plastic waste movements and transactions under a harmonized material code classification and requiring trade players to adhere to a comprehensive set of requirements in order to participate (e.g., sufficient waste management infrastructure). This type of tracking technology could also assist LMICs with implementing a plastic waste import tax to fund the development of their domestic solid waste management infrastructure. If successfully implemented, responsible international recycled plastic trade could be economically and environmentally beneficial to both Australia and importing nations due to a holistic improvement in regional waste management ecosystems. By improving waste management both domestically and in LMICs importing recyclables, Australia could simultaneously (1) decrease the proportions of Australian plastic waste mismanaged and landfilled, (2) contribute to LMICs sustainable development via boosting their waste management and creating jobs, and (3) substantially decrease loads of plastic leakages to oceans. Of upmost importance to the success of international plastic recycling systems is for HICs such as Australia to support LMICs by drastically improving the collection and sortation of their own domestic plastic waste; otherwise, the local recycling operations will continue to rely on overseas feedstock and the leakages to the environment will remain substantial.

Finally, even if Australia stops exporting plastic waste overseas as recently announced by the federal government (Australian Government, 2019; CoAG, 2020), there would still be a need for strong foreign engagement given the substantial OP sources surrounding Australia and the occurrence of overseas OP in Australian waters (MOFA, 2011; ASEAN, 2017, 2019a,b). It is time for Australia to show stronger environmental leadership on the international stage by facilitating and supporting existing and future transnational cooperation (IORA, 2017) and perhaps co-funding waste management infrastructure where it is most needed. In the same way Australia and other HICs use foreign policy aid to help build schools and hospitals in LMICs, we can contribute to implementing better waste management in places where the gap between social development and said infrastructure is the highest (Schnurr and Walker, 2019). Of particular relevance here is our study’s demonstration of the strong connectivity between the Australian and Indonesian plastic crises. Indonesia is not only a major player in the Australian plastic waste trade (i.e., ∼22% of Australian plastic waste exports reach Indonesia) but also a major source of OP (e.g., ∼70% of the overseas OP reaching Australia is from Indonesia). Therefore, strong bilateral approaches with Indonesia are particularly important for reducing plastic pollution in Australian waters and surroundings seas (Government of Indonesia, 2017; Marsdon, 2019; DFAT, 2020). Supporting Indonesia will not only benefit Australia’s own national interests but may also induce a knock-on effect by encouraging other HICs to show greater global responsibility (Schnurr and Walker, 2019).

Final Remarks

Plastic emissions into the environment have accelerated at a pace commensurate with plastic production. This, combined with the serious flow-on effects of plastic pollution on wildlife, economies, and human well-being, necessitates the urgent development and implementation of legislation and legally binding agreements on the production, use, and management of plastics, capable of keeping pace with the scale of this growing problem. Of upmost importance is for governments to move beyond recommendations and long-term non-binding commitments, and to start supporting transformative options, their implementation, and enforcement efforts, with clear and measurable progress targets and indicators. Since many issues found throughout the lifecycle of plastics are transboundary in nature, eradicating them will require a clear and binding global commitment to eliminate plastic contamination of our water, food, air, land, and oceans. An advantage related to plastic pollution when compared to other globally connected problems is that this issue is highly visible, has no deniers, and is receiving increasing public attention globally. Perhaps the wide acceptance of the urgency to act upon the transnational plastic crisis will act as a lever to pioneer an effective global regime that rapidly and cost-effectively (1) mitigates a serious transboundary problem and (2) serves as a flagship to catalyze similar undertakings on an even more serious issue that also results from our reliance on fossil fuels: climate change. The pace and scale of our solutions to pollution must start to match the pace and scale of emissions.

Author Contributions

JR, RG, and LL designed the study and analyzed the data. JR and RG prepared figures. JR, RG, and ET wrote the manuscript. All authors reviewed the manuscript.

Conflict of Interest

LL is employed by the company The Modelling House Ltd.

The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Acknowledgments

The authors thank The University of Western Australia, the Ocean Cleanup Foundation, and the Australian Institute of Marine Science for supporting this study. They also thank Julian Partridge, Marie-Lise Schlappy, and Heidi Tait for input in earlier versions of this manuscript.

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Keywords: marine pollution, marine debris, plastic pollution, Australia, connectivity, ocean currents

Citation: Galaiduk R, Lebreton L, Techera E and Reisser J (2020) Transnational Plastics: An Australian Case for Global Action. Front. Environ. Sci. 8:115. doi: 10.3389/fenvs.2020.00115

Received: 09 May 2020; Accepted: 30 June 2020;
Published: 22 July 2020.

Edited by:

André Ricardo Araújo Lima, Center for Marine and Environmental Sciences (MARE), Portugal

Reviewed by:

Kryss Waldschläger, RWTH Aachen University, Germany
Tony Robert Walker, Dalhousie Univesity, Canada

Copyright © 2020 Galaiduk, Lebreton, Techera and Reisser. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Julia Reisser, jureisser@gmail.com

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