In the US alone, the East Coast has recently lost 70% of its commercial bee population, with the West Coast not far behind those numbers. Apparently it's a result of Colony Collapse Disorder (CCD), when colonies essentially cease to be (no pun intended). From the Independent:

German research has long shown that bees' behaviour changes near power lines. Now a limited study at Landau University has found that bees refuse to return to their hives when mobile phones are placed nearby....Dr George Carlo, who headed a massive study by the US government and mobile phone industry of hazards from mobiles in the Nineties, said: "I am convinced the possibility is real."

Are Mobile Phones Wiping Out Our Bees? [via boingboing]
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