"It's the best summation of humanity's converging ecological problems and the best roadmap to sovling them, all in one compact package." —David Roberts, Grist on Plan B 4.0: Mobilizing to Save Civilization.

March 28, 2012
Lester Brown speaks as a keynote at the 2012 Limits to Growth Symposium hosted at the Smithsonian. Posted March 28, 2012.