Numerous recent studies link the CCD (Colony Collapse Disorder) of honeybees to the use of certain Neonicotinoid pesticides (e.g. imidacloprid, clothianidin, thiamethoxam).
Population of honeybee colonies has been dropping at an alarming rate since 2006. EPA keeps on ignoring the fact that there are effects from these pesticides on bee health. If honeybee health were of any concern to the EPA, the use of these pesticides would have been banned years ago. Countries such as France, England, Italy, Germany and Slovenia have banned at least some form of Neonicotinoids (e.g. for seed treatments).
EPA has agreed that there are "known acute toxicity of these compounds to pollinators" but has not even placed the use of these toxic pesticides on hold.