1. https://www.rts.com/resources/guides/circular-economy/.
2. Economics of Natural Resources and the Environment;Pearce,1990
3. https://ellenmacarthurfoundation.org/explore/plastics-and-the-circular-economy.
4. https://www.statista.com/statistics/282732/global-production-of-plastics-since-1950/.
5. Environmental performance of bio-based and biodegradable plastics: the road ahead;Lambert;Chem. Soc. Rev.,2017