Warren Buffett, the $65.6-billion man, proclaimed last week that he would double his investment in renewable energy across the United States.

Having already invested $15 billion in wind and solar farms in Iowa, Wyoming, California and Arizona, for instance, Buffett spoke at the Edison Electric Institute's annual convention in Las Vegas, saying he was ready with another $15 billion.

(READ the story in EcoWatch)

Photo credit: Mark Hirschey-CC