It turns out planes are even worse for the climate than we thought

        June 27, 2019 New Scientist | Global | fossil fuels: emissions

Non-CO2 contrails from airplanes have a greater effect on atmospheric warming than their CO2 emissions, and will triple as air travel quadruples by 2050. Flying produces 5% of global warming, including the net warming effect of contrails as water vapour condenses on emitted soot particles at high altitude, freezing to form a heat-trapping cirrus cloud.