- peak oil: eventually (probably not in a distant future) oil is going to become too expensive. What then?
- coal causes horrible pollution
- natural gas is non-renewable, just like oil
- nuclear power technology hasn't stagnated in the 70's
On a more empirical note, I live in France and energy here is much cheaper than anywhere else I lived (and this includes public transportation, which runs mostly on nuclear power in Paris). My home country, Portugal, has destroyed its industry with a government-subsidized windmill scheme. 70% of your energy bill there is tax.