Environmentalism for Billionaires

Lately, I've been inundated with phone calls from venture capitalists, private equity guys, and hedge fundistas. They're coming to me because I'm their environmentalist friend and they all want to know one thing: how they can make a buck off the surge in interest in combating global warming.

In a way, that's a sign that the environmental movement has finally arrived. After decades of struggling to convince the titans of finance that protecting the planet and making money weren't mutually exclusive, the tycoons are now coming to us.