U.S. farmers were not the only ones facing this problem. A similar decline in the bee population was reported in Canada,Brazil,and part of Europe. Research worldwide started looking for answer, and a range of theories for the losses soon emerged. one theory was that the bees were dying from a virus, a parasite, or a fungus infection. other theories blamed poor bee nutrition, pesticides,and cell phone radiation. It was also suggested that bees are simply stressed, because they are now raised to survive a shorter off-season and work more intensively than ever before.