>What's wrong with a load of Nuclear power plants?
Fuel - we've got at most 100 years left at current consumption rates. If you just went nuclear to provide our current electricity, you're down to 20 years. If you use it to replace all other sources of power, you've still got less than a decade, so why bother? You'll need to be building the windmills before you've finished half the reactors.
Breeder reactors would help, but almost no one is building them. Fusion power is 20-30 years away, like it has been for the last 40 years, so you'd be an idiot to bet on that, or any other SF invention.
There is no realistic prospect of finding new sources of fuel (at an economically viable cost - yeah, there may be some at the bottom of the Marianis trench or on asteroids, but it'll cost), unlike oil, we've already looked in all the cheap places.
Oh, and consumption is increasing. And most of our existing nuclear sites are under threat from climate change.
Sorry, but despite all the posturing from the industry and the others who can't do basic maths or read science properly (Lewis, I'm afraid I'm looking at you here), it's clear that nuclear power based on current tech is a dead duck. It can (and should) make up part of our power generation, but it can't do all of it for long enough to be useful as a complete fix.