Here's an old clean energy maxim: If life gives you volcanoes, make geothermal power. That's Indonesia's strategy, anyway, and it's working for them. By 2025, the country could get a third of its electricity from geothermal sources, and Al Gore has said it could be the first "geothermal superpower."

For the past couple of decades, Chevron has dominated the industry here, but since President Susilo Bambang Yudhoyono is promising clean energy subsidies, more companies are moving in. The goal is to have 9.5 gigawatts of geothermal capacity by 2025, which is triple the amount of geothermal that the U.S. produces. And the U.S. produces more geothermal energy than any other country in the world. But Indonesia does have a crapload of volcanoes, so it's sort of a shoo-in to win on this front.