A local-to-global emissions inventory of macroplastic pollution

Negotiations for a Global Treaty on plastic pollution will shape future policies on plastics production, use, and waste management. Its parties will benefit from a high-resolution baseline of waste flows and plastic emission sources to enable identification of pollution hotspots and their causes. Nationally aggregated waste management data can be distributed to smaller scale to identify generalised points of plastic accumulation and source phenomena. However, it is challenging to use this type of spatial allocation to assess the conditions under which emissions take place. To this, we develop a global macroplastic pollution emissions inventory by combining conceptual modelling of emission mechanisms with measurable activity data. We define emissions as materials that have moved from the managed or mismanaged system (controlled or contained state) to the unmanaged system (uncontrolled or uncontained state - the environment). Using machine learning and probabilistic material flow analysis..., Detailed information on how this dataset was collected and processed is available in the Supplementary Materials, associated with the publication., R studio and MSExcel were used for the analyses., # Supplementary files for A local-to-global emissions inventory of macroplastic pollution

**Authors:** 

Joshua W. Cottom - [[e-mail]](mailto:[e-mail])

School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, UK

[https://orcid.org/0000-0002-3480-3982](https://orcid.org/0000-0002-3480-3982) 

Ed Cook - [[e-mail]](mailto:[e-mail]) 

School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, UK

[https://orcid.org/0000-0003-3902-7705](https://orcid.org/0000-0003-3902-7705)

Costas Velis (correspondence) - [[e-mail]](mailto:[e-mail])

School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, UK

[https://orcid.org/0000-0002-1906-726X](https://orcid.org/0000-0002-1906-726X)

**MODEL VERSION:**

Spatio-temporal plastic pollution origins and transport model (SPOT) V1.1.0-G-1223

### **DESCRIPTION:**

Data and modelling files for SPOT V1.1.0-G-1223 as presented in the manuscript \"A local-to-glob...