
https://www.oecd.org/environment/support-for-fossil-fuels-almost-doubled-in-2021-slowing-progress-toward-international-climate-goals-according-to-new-analysis-from-oecd-and-iea.htm

https://www.bloomberg.com/news/articles/2018-04-04/europe-s-growth-engine-is-running-out-of-steam-chart

http://www.iata.org/publications/economic-briefings/value-of-air-cargo-2016-summary.pdf