I think the current problem is that the politicians who believe in implementing them don't have the numbers to actually do so, and voter apathy gets in the way of achieving those numbers. There's been a ton of climate policy over the years, it's just that for the last couple decades the party that pretends climate change doesn't exist has been stonewalling climate policy because it would hurt corporate profits.

Except Trump is implementing his platform, he's trying to sell off public land, destroy forests, and he's already gutted the EPA and many renewable energy programs.

So you can make up any excuse you want, anyone who cares about the environment and sat out 2024 is responsible for the backslide.