Cellphones May Contribute to Bee Colony Collapse, Study Suggests

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Pesticides, Disease, Poor Nutrition Weaken Bees' Immune Systems

"It's a whole bunch of causes combined together weakening the bees' immune systems, so they're not able to fight off infection," vanEngelsdorp said, adding that a few known factors are pesticide exposure, mice and fungal disease and poor nutrition. But scientists are still investigating why bees seem so vulnerable to these factors now.

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