@baldur The way I cope is by considering some possibilities for good outcomes. For instance, I regularly see posts that wind and solar have been much more effective than previously estimated. Electrification of cars is happening surprisingly rapidly in my home country of Bulgaria, which I wouldn't have expected. A friend recently told me that his hybrid car is shockingly cheap to drive in the city. (Electric cars have their own baggage re: rare minerals, but that's another topic to unpack).

None of this is to say we won't have a Bad Time re: climate change, some of that is already happening, just that we might be going in the right direction. War and oil shortages might be another nudge to European lawmakers at least that renewables are the way forward. In case gas-related pressure from Russia was not indicator enough.

Economy crashes connected to oil and AI in the US could be another blow to the lobbies in the EU. The narrative right now is the EU needs to be "competitive" with the US, because look at how good their markets are doing. That narrative is not going to survive the bubble(s) popping.

Re: Russia and nukes, I've always believed that Putin will eventually be assassinated by someone in his inner circle when and if the war with Ukraine turns into a loss. The propaganda machine would turn on him as the sole reason for the loss(es) and whoever takes power would run back and consolidate and frame it as something other than a loss. Nukes means the leaders in charge are retaliated against and these people want to live forever, not die in glory.

I don't know how likely any of these outcomes are, not arguing with your fears -- I agree that all of what you describe is real risks. Just that I do still hold out some hope that certain things end up not as bad as they could go.