[kodfodrasz]

Hydro is not an option at many places. Also dams also have negative environmental impact, which is often simply ignored.

Fusion will work eventually, but currently it is in the constant "we'll be there in 30 years" since the 1970s. Yet we are not getting further, but closer to it. Just thnik about it: now you have technology in your pocket that was used in putting humans on the Moon. More and more durable and special materials becoming cheaper and affordable. We are getting close to handle the heat, EM and possibly the neutron flux. It is doable in the near future (<100 years), thus worth pursuing. What we must avoid (this also applies to the energy storage tech for renewables) is the wishful thinking: "we can shut down nuclear powerplants, as fusion/battery tech will be solved in ten years: extrapolation from 2 conviniently chosen datapoints..."

Breeder reactors and Thorium based fuel cycle will mitigate the problem of running out of U235. Radioactive residual reprocessing will eventually be solved. Maybe peak-uranium will make it economically desireable. Btw there is current work on reprocessing spent radioactive fuel in reactors, at least in Russia and China.

I firmly beleive that while solar and wind will stay with us, they cannot be the fundamentals of our energy mix, and nuclear is here to stay. Simply many politicians are not ready to admit it yet.