It has to be mined and refined obviously.
...Which is a very far from clean, or safe process. If we want to add the perhaps paranoid danger of terrorism to this equation there is a threat against several steps in this chain, from refining of raw ore to transport of fuel rods, to transport and refining of spent fuel.
Also, many quite serious mishaps have occured in this chain, with loss of lives as a result. Greatly expanding nuclear power generation will greatly increase this danger.
Though have you seen the amount of pollution generated by coal plants?
Thanks, I live next to Denmark, which is predominantly coal-powered, and with the generally prevailing eastward winds in this part of the world, most of their shit rains down on my country, damaging our forests, lakes and waterways. We should fucking tax them for that (through buccaneering if neccessary) but our gov't is too pussyfied to actually do it.
However, pollution from coal power plants equipped with modern filtration tech is not acutely dangerous like the release of radioactive materials will be from a nuclear disaster, nor is it anywhere as long-term either. I never heard of mass-cases of thyroid cancer for example because of coal powerplants.
Solar power can efficiently used in relatively small parts of the world. In colder parts where energy usage is higher due to the need of heating it's especially ineffective while nuclear plants could help tremendously by providing directly both heat and electricity.
Heat should never be generated from electricity except in emergencies (or, for cooking obviously), that's an awful waste. We're simply going to have to become far less wasteful of electricity; just generating more and more so we can casually burn it for the sake of our own whims isn't going to be justifiable forever regardless what tech we use to generate power in the first place.
It's not a human right to be wasteful.