Sarah Greenwood is a sustainable plastics professional and multidisciplinary researcher working at the intersection of academia, industry, and policy. With a background in product development across manufacturing and retail, her work now focuses on the sustainability of plastics and packaging systems, reuse models, and the relationship between packaging and food waste. She co-led the Many Happy Returns: Enabling Reusable Packaging Systems project at the University of Sheffield and has contributed expert insight on BBC Panorama, BBC Breakfast, and BBC Radio. She recently successfully defended her PhD thesis, Plastic Packaging in the Circular Economy. Sarah is an Accredited Packaging Professional (APkgPrf), Fellow of IOM3 (FIMMM), co-Chair of the North of England Packaging Society, and a member of the Plastics Consultancy Network.