"The value of the global trade in food has tripled and the tonnage of food shipped between nati
"The value of the global trade in food has tripled and the tonnage of food shipped between nations has grown four-fold over the last few decades."
Source: Halweil, Brian. "Homegrown: The Case for Local Food in a Global Market." Worldwatch. November 2002. http://www.worldwatch.org/node/827