Renewable energy comes from more sources than just wind. Hydroelectric, solar panels, biomass, and geothermal to name a few.

Also a large part of the development of renewable energy sources is long term storage of that energy eg: batteries. So they charge up when the production peaks and get drained over time. ideally there would be a large enough buffer for the energy to remain consistent as the fluctuations in production ebb and flow.

Fukushima and Chernobyl. It's risk vs reward with nuclear energy. It's powerful and relatively clean energy, but when (not if) stuff goes wrong it can go REALLY wrong. Radiation is scary. People are completely right to be afraid of it. That said, you can be afraid of something and still realize it's usefulness and take appropriate precautions toward its use, learn from the mistakes made in the past and make a better system.

https://en.m.wikipedia.org/wiki/List_of_nuclear_power_accidents_by_country

It's a big list.