| Oct 2006 | Source: Washington Post (Washington) | |
| Oct 2006 | Source: Liberty Institute (New Delhi) | |
| Mar 2006 | Source: APT Enterprise Development (Moreton-in-Marsh, England) | |
| Mar 2006 | Source: APT Enterprise Development (Moreton-in-Marsh, England) | |
| Nov 2004 | Source: Afghan Non-Governmental Organization Security Office (Kabul, Afghanistan) | |
| Mar 2004 | Source: The Land Institute (Salina, Kans.) | |
| Nov 2003 | Source: U.S. Department of Agriculture/Oxfam America (Washington) | |
| Oct 2003 | Source: Environmental Working Group (Washington, D.C.) | |
| Jun 2003 | Source: U.S. Department of Agriculture | |
| Apr 2003 | Source: U.S.-Vietnam Trade Council (Washington) | |
| Apr 2003 | Source: Dan Sumner, University of California, Davis | |
| Jun 2002 | Source: Environmental Working Group (Washington) | |
| Nov 2001 | Source: Xinhua News Service (Beijing) | |
| Jun 2001 | Source: David Pimentel, Cornell University (Ithaca, N.Y.) | |
| Apr 2001 | Source: Union of Concerned Scientists (Cambridge, Mass.) | |
| Dec 2000 | Source: International Monetary Fund (N.Y.C.)/Worldwatch Institute (Washington) | |
| Dec 2000 | Source: Worldwatch Institute (Washington) | |
| Aug 2000 | Source: U.S. Department of Agriculture | |
| Aug 2000 | Source: U.S. Department of Agriculture | |
| Jun 2000 | Source: International Soil Reference and Information Centre (Wageningen, The Netherlands) | |
| Jun 2000 | Source: Texas State Historical Association (Austin) | |
| May 2000 | Source: U.S. Department of Agriculture | |
| May 2000 | Source: U.S. Department of Agriculture | |
| May 2000 | Source: U.S. Department of Agriculture | |
| May 2000 | Source: U.S. Department of Agriculture | |
| Apr 2000 | Source: Prof. Bill Chameides, Georgia Institute of Technology (Atlanta) | |
| Apr 2000 | Source: Prof. Bill Chameides, Georgia Institute of Technology (Atlanta) | |
| Jan 2000 | Source: Hemp for Victory, USDA Motion Picture Services Division (Washington) | |
| Jan 2000 | Source: Diamond, Guns, Germs, and Steel | |
| Nov 1999 | Source: Center for Science in the Public Interest (Washington) | |
| Sep 1999 | Source: Prof. Ulrich Mueller, University of Texas (Austin) | |
| Apr 1999 | Source: Monsanto Co. (St. Louis, Mo.) | |
| Sep 1998 | Source: Bureau of Economic Analysis (Washington) | |
| Aug 1998 | Source: American Farmland Trust (Washington) | |
| Jul 1998 | Source: George Washington's Mt. Vernon Estate and Gardens (Mt. Vernon, Va.) |
| May 24, 2008 | Source: Financial Post | |
| May 31, 2007 | Source: Independent Online | |
| March 29, 2007 | Source: PTI via Hindu | |
| January 4, 2007 | Source: AP via Yahoo! News | |
| November 27, 2006 | Source: New York Times | |
| November 2, 2006 | Source: New York Times | |
| March 31, 2006 | Source: The New York Times | |
| February 23, 2006 | Source: LA Daily News | |
| February 2, 2006 | Source: The Guardian via Common Dreams. | |
| August 10, 2005 | Source: AZCentral.com | |
| July 28, 2005 | Source: The Fix | |
| April 25, 2005 | Source: BBC News | |
| April 6, 2005 | Source: Biology News Net | |
| April 3, 2005 | Source: Wine International | |
| March 16, 2005 |