Nuclear power as it stands isn't a long term answer as we still haven't found a way of storing the spent fuel for millennia. If you don't believe that's true, go and lick a spent fuel rod and we'll see.

For us as a species, renewables are the only practical way forward at present. There's so much free energy wafting around it's almost ludicrous we don't capture and use it but the tide is turning here (barrage!) and the developing world is leading the way in this regard.

However, Steve's point about energy usage is a good one, it's just I guess most people don;t understand the scale of the problem. However, they soon will.