Why not try a Staycation for six months and do all your commerce online. It would be interesting as an experiment to see what difference it makes to the weather.
I dont care care if businesses go tits up because of con trails. I would rather see us return to using boats to get around. Much more civilised.
we can travel by train faster than by air nowadays.
If the people of the world decided to stop travelling by air, I am sure a lot of significant changes would happen. Not exactly sure what, but it would be much better for us.
Certainly long distance travel at high altitudes wouldn't give us all cancer.