The Ninth Circuit decision orders the EPA to revoke all tolerances and cancel all registrations for chlorpyrifos within 60 days. A federal appeals court has ordered the Environmental Protection Agency (EPA) to ban the pesticide chlorpyrifos, which former Administrator Scott Pruitt refused to do last year.The decision is a major win for environmentalists and health advocates. The EPA’s own research, as recently as 2016, linked chlorpyrifos to developmental and neurological disorders, especially in children and infants.The Court of Appeals for the 9th Circuit said the Federal Food, Drug and Cosmetic Act, the federal law governing pesticides, requires the EPA to ban the allowance of a pesticide on food if it finds any harm from exposure to it.