Renewable energy is booming. The use of solar power has been growing by more than 30% a year and, except for a hiccup in 2004 — when Congress delayed renewing a tax credit — so has wind power. Ethanol is heading for record production levels. And there’s no end in sight, given high oil and gas prices, an increasing number of government mandates and incentives, and the first real steps toward tackling global warming…
