Fusion is perhaps better, but not ready. We’re out of time, and doing nothing new guarantees death for all.
Modern nuclear reactors, especially ones not trying to turn a profit, and be made extremely safe in almost any environment. Investment in solar and wind is good too, but they can’t handle the current loads needed to keep things working.
Even something as simple as requiring all new construction be outfitted with solar panels would be a step forward, but politics and money will be the death of us all. Literally.