Science reviews how early bio-based plastics were neither clean nor green, while other papers look at where bioplastics fit in the circular economy of the future. The SMC asked experts to comment on bioplastics. Dr Karyne Rogers, Environmental Scientist - Isotope Biogeochemistry, GNS Science, comments: “A recent bioplastic authentication paper published in an international journal by scientists at GNS Science found around 50 per cent of in-market bioplastics don’t meet their claims and are subject to greenwashing. Greenwashing is a ploy that many companies use to make their products look more eco-friendly and bioplastics are no exception. Some plastics are coloured green or have ‘bio’ in their brand or name,