We know, we know, there's another member of the Clinton administration that's done more than his share of promoting green ideas and fighting climate change. But ol' Bill himself has been a fantastic ambassador of green, too.
One need not look any further than his stellar Clinton Global Initiative to see the real world impact William Jefferson has had: With tens of millions of metric tons of greenhouse gas emissions cut, millions of people treated for tropical diseases, and hundreds of microfinance institutions funded, CGI has been an indisputable positive force in the world. And the annual talks gather world leaders, scholars, celebrities, and scientists to advance the global discourse on topics like renewable energy and climate change. --Brian Merchant
photo: Roger H. Goun via flickr, Creative Commons Attribution License