Experts are at a loss to explain the fall in honey bee populations in America, with fears of that a new disease, the effects of pollution or the increased use of pesticides could be to blame for "colony collapse disorder". From 1971 to 2006 approximately one half of the US honey bee colonies have vanished.
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Honey Bees in US facing extinction
Puzzling Decline of U.S. Bees Linked to Virus From Australia
Erik Stokstad
Researchers report online in Science this week(www.sciencemag.org/cgi/content/abstract/1146498) that they have found an imported virus that may be associated with the sudden disappearance of honey bees in the United States, known as colony collapse disorder.
Full story at http://www.sciencemag.org/cgi/content/full/317/5843/1304?etoc