النحل ينقرض فى العالم: يقول إنشتاين إذا أنقرض النحل سوف ينقرض الأنسان فى أربعة أعوام!

Quote: Bee die-off endangers food chain The Associated Press http://www.tucsoncitizen.com/daily/nationworld/50356.php BELTSVILLE, Md. - Unless someone or something stops it soon, the mysterious killer that is wiping out many of the nation's honeybees could have a devastating effect on America's dinner plate. They don't just make honey; bees pollinate more than 90 of the tastiest crops we have. About one-third of our diet comes from insect-pollinated plants, and the honeybee is responsible for 80 percent of that pollination, according to the U.S. Department of Agriculture. Even cattle, which feed on alfalfa, depend on bees. So if the collapse worsens, we could end up being "stuck with grains and water," said USDA bee expert Kevin Hackett. "This is the biggest general threat to our food supply." While some scientists noted that large-scale bee die-offs have occurred before, this one seems particularly baffling and alarming. U.S. beekeepers in the past few months have lost one-quarter of their colonies - or about five times the normal winter losses - because of what scientists have dubbed Colony Collapse Disorder. The problem seems to have spread to 27 states, Brazil, Canada and parts of Europe. Scientists are struggling to figure out what is killing the honeybees, and early results of a key study this week point to some kind of disease or parasite. "Quite frankly, the question is whether the bees can weather this perfect storm," Hackett said. "Do they have the resilience to bounce back? We'll know probably by the end of the summer." The USDA's top bee scientist, Jeff Pettis, said the top suspects are a parasite, an unknown virus, some kind of bacteria, pesticides or a one-two combination among the top four, with one weakening the honeybee and the second killing it. Said Pettis: "The problem is that everyone wants a simple answer, and it may not be a simple answer."