I don't think that's necessarily the hurdle. The people that believe climate change is real are more likely than not billionaires or wealthy individuals. Right now, there's a real divide between what people believe and the actions of their representatives because attempting to fix the climate isn't profitable. And capitalism is real bad at solving problems without a profit incentive. This combined with industries and individuals whose lives depend on climate change not being a threat means that it's just another class warfare battle.

Solving this problem requires new elected officials who believe climate change is an issue and then taking actions that'll likely outright destroy prior industries.