yes fission would be nice but would more than likely set fire to the atmosphere
fusion is the way to go, just gotta find a place to dump it all

have a loot T THE pistol shrimp its claw snap generates heat in the thouands of degs

the study compares contrails and without contrails
they are not that irratic, condensed water vapour, it is a hell of alot more efficient at reflecting the heat back down than carbon