well of course its bad if we are to discuss a bunch of science fiction alternatives.
with what we are using NOW for power, nuclear is clean efficient and just all around better then anything.
and no, wind, water, solar is not efficient. to power cities, there isn't space enough to have it all.
hoover damn cant power a city on its own. it takes like 5k windmills to power a small town.
every house in the country can have solar panels and it wouldn't be enough.
it helps, but its not a replacement.