These are some resources we used in our research that you should check out:
https://www.plasticseurope.org/en/about-plastics/what-are-plastics/how-plastics-are-made
https://www.iucn.org/resources/issues-briefs/marine-plastics
https://www.britannica.com/science/polymer
https://www.unenvironment.org/interactive/beat-plastic-pollution/
https://www.wwf.org.au/news/blogs/the-lifecycle-of-plastics#gs.risyue
https://www.sas.org.uk/our-work/plastic-pollution/plastic-pollution-facts-figures/
https://hudsonvalleypost.com/report-hudson-valley-incinerator-one-of-top-polluters-in-u-s/
https://interestingengineering.com/13-bioplastic-innovations-that-might-save-the-environment
https://www.plasticstoday.com/made-bioplastic-best-2015
https://learn.eartheasy.com/guides/the-best-eco-friendly-alternatives-for-the-plastic-in-your-life/