Maybe I don’t know enough about the subject, but why don’t we just let the market sort things out? The best way to promote a more diversified usage of energy is to have an increase in oil prices. Look at how many more Prius’ there are on the road, and how many more people are carpooling, taking mass transit, or riding their bikes instead of driving. I am sure that countless young (and old) entrepreneurs and inventors have been created as a result of the recent runup in energy prices. This is the free market at work. The government and taxes only serve to complicate things IMHO.