Nuclear energy is the most promising and most efficient alternative energy source on earth. The world needs nuclear energy, but it has to come with TIGHT regulations. No more letting large energy corporations skip by regulations and play fast and loose with the environment and safety ***COUGH BP OIL SPILL COUGH***
It is very important to society. On a different note, I do think that it should be heavily regulated, possibly even directly under government control.
It is way better with it, but NEED is a strong word.
If we keep relying on nuclear power then the nuclear meltdowns and radiation caused is going to give everyone illnesses like cancer