Comment Comment by ZeroGravitas They are roughly equal problems at the moment.> Recent estimates show that contrails cause about the same amount of warming each year as all the CO₂ emitted by all flights from 1940 to 2018. parent ZeroGravitas 1 month ago
> Recent estimates show that contrails cause about the same amount of warming each year as all the CO₂ emitted by all flights from 1940 to 2018.