(Earth Focus: Episode 44) Honeybees, the essential pollinators of many major crops, have been dying off in massive numbers since 2006 threatening U.S. agriculture and the one in twelve American jobs that depends on it. A class of widely used pesticides called neonicotinoids may be responsible. The U.S. EPA allowed them on the market without adequate tests to determine their toxicity to bees. Environmentalists want them banned. While the U.S. government is slow to act and neonicotinoid sales reap billions for the chemical industry, bees continue to die.