From 1852 to 1968, about 6,280 tons of dichlorodiphenyltrichloroethane (DDT) were sprayed over forests in New Brunswick, Canada, to prevent severe outbreaks of the spruce budworm. Now, over 50 years later, researchers have detected that sediments of DDT remain in New Brunswick lakes, even long after these insecticides were deemed harmful to wildlife and the spraying stopped. read more