One interesting wrinkle of GHG emissions from planes is that vapor trails can be worse for climate at certain times of day. There's still some arguing about ho

One interesting wrinkle of GHG emissions from planes is that vapor trails can be worse for climate at certain times of day. There's still some arguing about how to price this in accurateley but this was part of the reason that Google changed their GHG measure for flights recently. They previously just averaged it, but ideally want to encourage flights at times when it is less of a problem. https://skift.com/2022/09/01/google-flights-changes-to-emissions-calculations-stir-controversy/ https://skift.com/2022/09/01/google-flights-changes-to-emiss...