ESR8 will study the degradation and associated changes on conventional and biodegradable polymers exposed to environmental factors, work on the identification and characterisation of MP and help to characterise MP in samples from WP2. Foci of the study will be the effect of abiotic and biotic factors on chemical changes on the polymer. Work will combine laboratory experiments, analysis of samples collected from the environment, and state-of-the-art methodologies for isolation, identification, and characterisation. Conventional plastics as well as biodegradable plastics will be investigated. Based on the results, plastics will be evaluated.