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 don't forget the politicians and media personalities who knowingly or negligently denied that there was even a problem.
And since we've all known about this for 30+ years, is it still their fault, or is it ours?
Including executives that still refuse to price in the environmental externalities of their business practices.