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Why are America's bee colonies dying?

Name: Why are America's bee colonies dying?
Uploaded: 2015-05-17T18:54:57-0400
Duration: 2 min 11 s
Description: Honey bees are an essential part of U.S. food production, but they're dying off at an alarming rate. And as Mark Albert reports, scientists don't know what’s causing the sharp increase.

Honey bees are an essential part of U.S. food production, but they're dying off at an alarming rate. And as Mark Albert reports, scientists don't know what’s causing the sharp increase.