1. Beyond plastic waste
2. Production, use, and fate of all plastics ever made
3. The future of plastics recycling
4. United States Department of Energy , Report of the Hydrogen Production Expert Panel: A Subcommittee of the Hydrogen & Fuel Cell Technical Advisory Committee , Washington, D.C. , 2013
5. International Energy Agency, Tracking Clean Energy Progress 2015: Energy Technology Perspectives 2015 Excerpt IEA Input to the Clean Energy Ministerial, Paris, 2015