AltEn, an ethanol plant in Mead, Nebraska, has been the source of numerous community complaints over the use of pesticide-coated seeds for use in its biofuel production and the resulting waste products, which have been shown to contain levels of harmful neonicotinoids and other pesticides well above levels generally considered safe.
The concerns in Mead are but the latest example of growing global fear about the impacts of neonicotinoids.
See this story in The Guardian.
See here some of the regulatory documents related to the controversy as well as other background materials:
Vanishing Bees: Science, Politics and Honeybee Health (Rutgers University Press, 2017)