Nuclear energy: Well it's still not the cleanest, but it certainly beats oil!
The best thing about it is that it's fairly clean and it still generates alot of power.
Wind and solar energy isn't quite there in terms of effeciency. You would need alot of windmills or solar panels just to power one community.
Hydroelectric energy is crap if you want to be eco-friendly. it actually does more harm by disrupting river ecosystems.
Wind power could mean bad news for bats and migratory birds.
Ethanol is complete and utter bullshit even if it burns cleaner than fossil fuels. All it means is that we waste more food, let the hungry people starve, and destroy more natural habitat to create farmland.
So i guess nuclear's ok, just as long as we dont have any "accidents" like Chernobyl.