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Plastic debris within marine environments is an issue of global concern, leading to commitments at international, regional, and national scales to remove plastics from the environment and prevent further entry. The United Nations (UN) created a global framework of 17 Sustainable Development Goals (SDGs), with several goals to advance the environmental dimension of sustainable development, with global and country progress tracked by targets and their indicators. Countries voluntarily report their progress on the basis of guidance provided by the UN on what data is needed. SDG 14, Life Below Water, contains one target to significantly reduce marine pollution, with specific mention of plastic debris. To date, however, national information on plastic debris has been sparse, although citizen science projects have been collecting data at a spatial and temporal coverage relevant to SDG reporting. This paper provides an overview to clarify the data requirements for reporting on the SDG indicator of plastic debris density and the complex process in which data for SDGs is requested from and provided by countries. We then explore the potential for citizen science to assist countries in filling evidence gaps, through providing data on plastic pollution. We focus on the sub-indicator for beach debris, which accounts for most citizen science projects collecting data on plastic pollution. Then, we unpack the opportunities and challenges of augmenting SDG reporting with information gathered from citizen science communities. Lastly, we recommend ways for citizen science communities and governments to synergize efforts monitoring plastics to inform pathways for preventing and reducing such pollution ending up in our marine environments. [ABSTRACT FROM AUTHOR]

We describe the design and structure of a web-based visualization tool for an Australian marine debris database and its application in environmental research, management and science communication. We give examples of its use in generating hypotheses regarding processes driving the distribution of marine debris, identifying source reduction opportunities and communicating science to the public and stakeholders. We suggest this as a model for utilizing other latent environmental data sets, enabling users to implement the five 'source-to-sea' steps to characterize, engage, diagnose, design, act and adapt when addressing leading environmental concerns. [ABSTRACT FROM AUTHOR]