> whatever carbon you tax in the USA or Europe will simply be emitted by China and other developing countries, consequently boosting dirty economies and kneecap

> whatever carbon you tax in the USA or Europe will simply be emitted by China and other developing countries, consequently boosting dirty economies and kneecapping cleaner economies This argument has been used against every environmental regulation since the 70s. It wasn't a good argument then and it still isn't. Yes, obviously it would be better if we could get every country to agree on reducing pollution. That doesn't mean it's pointless to reduce emissions even if it's localized to only certain countries.