According to a 2001 study by the Foundation for Advancements in Science and Education in the International Journal of Occupational and Environmental Healt U.S. companies export 45 tons of pesticides per hour to other nations, includ ing highly toxic chemicals such as alachlor, chlordane heptachior, and metribuzin. The United States banned the use of chlordane and heptachlor as an insecticide on crops or around residences 10 to 20 years ago. Vel sicol Chemical Corporation, however, reported in 1997 that it was still manufacturing chlordane and hepta chlor for export. It exported these chemicals to Africa for use on roads, to Australia and Far Eastern coun tries to spray in residences,and to south america to