The U.S. Senate has approved a bill granting $170 million to Flint, Michigan, to help replace pipes that are leaching toxic lead into Flint’s drinking water. Flint’s lead poisoning crisis began last year when an unelected emergency manager appointed by Michigan Governor Rick Snyder switched the source of the city’s drinking water to the corrosive Flint River. Today, the water in Flint is still poisoned and unsafe to drink. Meanwhile, environmentalists are warning of a provision of the bill which rolls back protections to California’s Bay-Delta Estuary. Environmentalists say the changes threaten delicate ecosystems and undermine the Endangered Species Act.