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...
1. https://news.harvard.edu/gazette/story/2023/01/harvard-led-a...
https://www.smh.com.au/environment/climate-change/inside-and...
There is no way people would have or will accept living in Honk Kong style dense living to save the future planet. Hell, they don’t even accept driving smaller vehicles much less changing their whole lifestyle.