Your assumption that it is possible to live a broadly similar lifestyle to what we have now, by having "clean fuels" - this is just magical thinking.
Some of it might be possible, but a lot of what is being pushed politically by the current environmental movement is very questionable in terms of it's actual environmental impacts, and just it's viability. Electric cars being a major one. The push to veganism which you see from many radical environmentalists which mainly shows they know nothing about sustainable agriculture.
Screaming at people who question this stuff is one of the main reason a lot of reasonable conservative commentators turned off on these issues. People on the left seem to have decided, at some kind of ideological level, that it must be possible to maintain a "modern" kind of lifestyle without carbon, through tech, and that questioning the actual nuts and bolts of this shows a lack of faith.
And if anyone brings up the practicalities of the economic impacts - crickets. How can you talk to people about approaches to problems under those circumstances? So you get whole countries trying to switch to EVs, at great cost, which will be a failure if not a disaster, including environmentally, and people who see it happening just stay quiet.
In the meantime these idiots go around stopping people going to work while clearly living tech based lives, often quite privileged ones, themselves. No one takes them seriously, and why would they?
I'm old enough to remember when the environmental movement was much more up front and realistic about the extent to which all people in the west would need to change their lifestyles to live within the means of the planet. And it wasn't just about carbon emissions either, they also thought about other kinds of environmental impacts.
And none of them are really talking about the part that is really difficult, which is how to make it work without sending the globalized economy of the rails. Which frankly no one knows how to do and why they keep tinkering with carbon credits and net zero and the rest.