Chlorinated hydrocarbon pesticides are used widely in agriculture, structural pest control, and malaria control programs around the world. Lindane is used medicinally for the treatment of lice and scabies. Chlorinated hydrocarbons are of major toxicologic concern, and many (eg, DDT [dichloro-diphenyl-trichloroethane] and chlordane) have been banned from commercial use because they persist in the environment and accumulate in biological systems. Despite being banned decades ago, these substances are still being measured in the environment and food chain in ongoing studies. In 2002, sale of lindane was banned in California.