I don't understand your logic. We had a huge eruption of Mount Pinatubo back in 1991. I was in high school and remember the effects that year. It had a really big impact on global weather patterns including dropping the temperature significantly, but it certainly didn't "kill a lot of flora and fauna." Yes, there was a lot of local damage around the volcano, but that was due to the ash.
We could just build more fission nuclear reactors (and we are now, finally). Fusion is still decades away, even though they've made a big advance recently due to more efficient super-conducting magnets. And renewables really need better energy storage solutions to really increase adoption.
The fact is that with deglobalization and the fall of global institutions, every country now has to guarantee its own energy independence. In the US, that's shale oil (and natural gas). In China that's coal, since almost all of their oil has to be imported from the middle east, and China has a ridiculous amount of coal. Europe would love to switch to renewables, but let's face it, they need to spend money on their military right now, and won't be able to afford subsidizing solar panels in countries where the sun hardly shines.
The problem isn't going away.
Do you have an actual workable idea, or are we all just supposed to lay down and die? You can do that if you want. The rest of us are going to work the problem.
I mostly agree with you, but I think it might be unfair to the average American voter. Imagine that you live in West Virginia or Missouri, and you're struggling to get by, as many people are. Your wages haven't kept pace with inflation. You can't afford a house, and the price of houses seems to be rising faster than wages. Big companies have left your town to setup shop overseas, and your neighbors are out of work. Your health insurance sucks and is anything but universal. One big illness could wipe you out. When your wife had a kid, she got 6 weeks(!) of maternity leave, and had to be back at work.
Then you look at the US armed forces... there are 13(?) aircraft carriers that outmatch everything else on the ocean. Stealth bombers that look like spaceships. NASA launching huge rockets at enormous expense to go land people on the moon, when they already did that 45 years ago. A huge nuclear arsenal. This is all to be the world's police, and to provide a security umbrella to Europe.
And then you look at Europe, with their two years of maternity leave, and worker protections, and way more paid holidays, and universal healthcare, and they all like to look down their noses at Americans, while they benefit from a massive security umbrella that the US provides, which frees up the funds to spend on social programs.
Everyone thinks the MAGA crowd are traditional conservatives. Sure, there are some, but the core group of voters used to be democrats. They were union workers, laborers. They saw their savior in Bernie Sanders, and when the dems wouldn't let him run, they decided to follow the other populist voice. Is Trump lying to them? Absolutely.
I don't relate to MAGA at all. But I get it. The security arrangement might have been good for the US in general, but it hasn't been good for the average American worker. That's why we're here.
And there are going to be austerity measures coming to all of Europe. Those social programs are going to shrink. Right at a time when everyone's arming themselves to the teeth. How do you think that's going to play out?
"If value corrupts then absolute value corrupts absolutely."