The U.S. House of Representatives has passed a bill to block the Environmental Protection Agency from regulating coal ash—a byproduct of burning coal for electricity. The bill gives control of coal ash disposal to the states, which are required to regulate it as least as stringently as municipal waste.Environmental groups opposed the bill, arguing the Environmental Protection Agency should regulate coal ash. The EPA has proposed two rules to control the substance, but if the House bill becomes law, it will be prohibited from instituting either rule.The bill passed267 to 144. Kentucky Democrat John Yarmuth voted against the bill, while Democrat Ben Chandler and Republicans Ed Whitfield, Brett Guthrie, Hal Rogers and Geoff Davis supported it.The bill’s chances in the Senate are unknown. Many Republicans are expected to vote in favor of it, but some coalfields Democrats have also expressed support.