DU PONT reduced toxic chemical releases reported to the Environmental Protection Agency by 30% in 1990, compared with 1989. More than 80 U.S. Du Pont plants reported combined toxic releases of 236 million lb in 1990. Reductions occurred in air, water, and land emissions as well as transfers off site. Two thirds of the reported releases were due to permitted underground injection in deep wells. Du Pont said it is committed to eliminating underground injection of hazardous waste by 2000.