Legally? Almost certainly no one. Ethically? The corporate executives who deliberately covered up evidence of global warming, starting back in the 70s.[1]

1. https://news.harvard.edu/gazette/story/2023/01/harvard-led-a...

And since we've all known about this for 30+ years, is it still their fault, or is it ours?

What should I have done about it for the past 30 years?

Voted for the environmental candidate every time.

Already did, we still ended up here, clearly that solution didn't work

Nothing. My point was simply that blaming people who did something 40-50 years ago is pretty silly.

Including executives that still refuse to price in the environmental externalities of their business practices.

Why would they do that? That would make their shareholders angry and give their competitors an edge. (No /s)

And don't forget the politicians and media personalities who knowingly or negligently denied that there was even a problem.

They're winning. They have billions of dollars and very cushy lives.

All of us, to the degree that our carbon footprint is above 2 tons a year?

Nobody is liable.