r/worldnews - By changing the flying altitude by just couple of thousand feet on fewer than 2% of all scheduled flights, a study by a team of scientists at Imperial College London concludes that aviation's damage to the climate could be reduced by as much as 59%.

This is the best tl;dr I could make, original reduced by 90%. (I'm a bot) The big difference between C02 emissions produced by an aircraft and contrails is that contrails don't last very long, a maximum of about 18 hours. via Pocket https://ift.tt/2HrWPgA