A combination is key, I think. Renewables have the obvious pro of being renewable, but there's no denying their own climate and eco risks, let alone the fact that they aren't very efficient at generating said power.

While Nuclear is long lasting, powerful, and extremely efficient; the cons are obvious.

It's too bad we weren't able to create a couple of sub-orbital nuclear power plants. If we had a way to transfer the energy to earth, moving nuclear power off-planet could be a huge win. If something goes wrong, just kick that baby out to the cosmos and drop another quadrillion on a new one. Obviously nothing could go wrong.