"Oil wells go dry and coal seams run out, but for the first time since the Industrial Revolution began we are investing in energy sources that can last forever." –Lester R. Brown, Plan B 4.0: Mobilizing to Save Civilization.

July 22, 2011
Lester Brown and Robert Engleman of Worldwatch Institute answer tough questions on population on MSNBC's Hardball with Chris Matthews. Posted July 22, 2011.