The biggest flaw of democracy is that politicians need votes, for them and their party, and getting them is their main objective. They do unpopular things, but make immense efforts to spin it as desirable.
Climate change will be properly addressed until the general population suffers from it, and threatens to vote for someone who actually does something. At that point, an emergency state could be declared and the votes won't be as valuable.
And an opening statement from Forbes article in Dec 2020: "By most accounts, President-elect Joe Biden will continue President Trump’s nuclear energy legacy — to aggressively develop U.S. technology for export to the international market within five to seven years." https://www.forbes.com/sites/dipkabhambhani/2020/12/01/biden...
For all their flaws (and there are many, don't trust a Tory) our government in the UK has done a good-ish job with environmental policy. Not great, but not like the early Trump admin going full retard over fossil fuels, science etc.
We even did a carbon tax and it seems to work.