High gas prices and pollution spur it and the answer, imo, is good ol American ingenuity in the field of energy. Our propeller heads are hard at work and $1/watt solar energy is quickly approaching, which would put it on par with the price of coal.

If we can be on the cutting edge of: solar, biofuels, hydrogen, engine development, nuclear, wind, geothermal, etc. etc. and control the patents we will change the world and make tons of money doing it.