1. Hydrogen-powered aviation,2020
2. Destination 2050-A route to net zero European aviation,2021
3. Global warming of 1.5°C;Masson-Delmotte,2018
4. The European Green Deal sets out how to make Europe the first climate-neutral continent by 2050, boosting the economy, improving people's health and quality of life, caring for nature, and leaving no one behind,2019
5. CO2 emissions from commercial aviation 2013, 2018, and 2019;Graver,2020