Lester Russel Brown (born March 28, 1934 in Bridgeton, New Jersey) is a US environmentalist, founder of the Worldwatch Institute, founder and president of the Earth Policy Institute, a nonprofit research organization based in Washington DC and the author or co-author of over 50 books on global environmental issues and his works have been translated into more than forty languages. His most recent book is Plan B 4.0: Mobilizing to Save Civilization (see: http://en.wikipedia.org/wiki/Lester_R._Brown ).
Lester Brown, videoed lecture on food supply and demand constraints, commencing with the collapse of Sumerian agriculture (deforestation, salinization) and dealing with demand constraints (population growth, rising affluence and conversion of grain to fuel) and supply side constraints (notably water, ice melting, water table lowering , over-pumping and aquifer depletion) (2011). [1].
[1]. Lester Brown, “Averting Environmental Genocide- Plan B 4.0”, You-Tube, 21 April 2011: http://www.youtube.com/watch?v=8_Y_ue6km20 .