Nuclear plants, hypothetically, could help us stay under...2 or 3C by 2040? We should have embraced nuclear much earlier than now, but given the disasters in Ukraine and Japan, I get NIMBYism.
Fusion seems promising. Carbon capture is an interesting idea but hasn't been really tested on a wide scale and we don't know the dangers of removing carbon from the atmosphere if we were to scale it up.
One thing that we're about to discover is that emissions, though they contribute to the problem of heat trapping gases building up in our atmosphere, simultaneously reduce surface temperatures by blocking radiation. Now that we're reducing fossil fuel emissions, those surface and ocean temps are going to skyrocket.
We're now in an ENSO cycle, and we're already seeing alarmingly high ocean temperatures in the Eastern Pacific. We could be looking at a heating event that is hotter than anything we've experienced in the last 10,000 years and possibly in the last 100,000 years.
People think of global climate change as just "Oh well, more heat. Fuck it, I'll stay indoors then." If everyone has the same idea at the same time, then that's a problem for the power grid. But more than that, they're not thinking about the collapse of water sources, the collapse of agriculture, the violent swings from one weather extreme to another. Last year, much of the US experienced crop failures due to extreme drought. California farmers, like those in Pakistan, are now SOL due to extreme flooding.