"Attention has focused on oil insecurity, and rightly so, but it is not the same as food insecurity. An empty gas tank is one thing, an empty stomach another. And while there are substitutes for oil, there are none for food." –Lester R. Brown, Plan B 4.0: Mobilizing to Save Civilization.
"We only have months, not years, to save civilisation from climate change," commentary on the U.N. Climate Change Conference by Lester Brown in the Guardian, November 3, 2009.