[maigret]

The thing is that the chemical effects involved at the altitude airline planes fly is way more greenhouse impactful that the same consumption for a car, so you can’t compare that way. Also, trains are way better than this. French trains drive you around on nuclear energy.

[usrusr]

But that increased impact is a short term difference, right? The changes to air composition we cause by digging up in a few decades what had been sequestered off in millions of years are forever changes.

[maigret]

Good questions, I don’t know enough details. CO2 stays in the air for a long time, but not forever either. For sure though, it’s absorbed way too slowly than what we’re outputting now.