Tel Aviv University scientists have invented a process to make bioplastic polymers from bacteria that feed on seaweed. No need for oil, fresh water or land and there are no toxic waste products. The plastic is bio-degradable and can be recycled into organic waste. (see publication here)

http://www.jewishpress.com/news/science-and-tech/sustainable-plastics-are-on-horizon/2018/12/25/