1. http://www.plasticseurope.org/use-of-plastics.aspx
2. According to the 2017 BP Statistical Review of World Energy, global total reserve levels, by fossil fuel, are 1139 billion tonnes of coal (extraction would be exhausted in year 2169), 187 trillion cubic meters of natural gas (extraction would be exhausted in year 2068), and 1707 billion barrels of crude oil (extraction would be exhausted in year 2066). These data can be found at https://www.bp.com/en/global/corporate/energy-economics/statistical-review-of-world-energy.html
3. W. Keim , CHAPTER 2: Fossil Feedstocks – What Comes After? in Methanol: The Basic Chemical and Energy Feedstock of the Future , ed. M. Bertau , et al. , Springer-Verlag , Berlin Heidelberg , 2014
4. Plastic waste inputs from land into the ocean
5. Biodegradability of Plastics: Challenges and Misconceptions