A tractor pulls a planter while distributing corn seed on a field in Malden, Ill. Two scientists agree that pesticide-laden dust from planting equipment kills bees. But they're proposing different solutions, because they disagree about whether the pesticides are useful to farmers.
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Pesticides called "neonics" are popular among farmers, but also have been blamed for killing bees. In Canada, the province of Ontario is trying to crack down on neonics, with mixed results.
Minnesota's governor has ordered new restrictions on the use of neonicotinoid pesticides, which have been blamed for killing bees. Many details of the plan, however, remain to be worked out
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A crop duster sprays a field with pesticides. Former USDA scientist Jonathan Lundgren says that he has been persecuted by the agency because his research points out problems with popular pesticides.
The White House announced an action plan Tuesday aimed at reversing dramatic declines in pollinators like honeybees, which play a vital role in agriculture, pollinating everything from apples and almonds to squash.
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The U.S. Geological Survey found that neonicotinoids are leaching into streams and rivers in the Midwest, including the Missouri River, shown here in Leavenworth, Kan.