You…can’t be serious right now…can you? Or are you conflating nuclear power with nuclear bombs? Because the two are very different things.
As climate change leads to non-traditional weather, people won’t be able to farm in the same places. People will be displaced, famine will hit. Droughts will clear up water sources and fights over water rights will happen.
The only way to reduce the impact is big, non-emitting power that can run 24/7/365 and the only contender for that is hydro and nuclear. And we’ve already built hydro just about everywhere that’s feasible to do so. With a surplus of cheap energy, we can improve hydroponics/vertical farming, reduce transportation needs for food (by growing it closer to population centers), and develop a means of scalable desalination.