The Interior Department finalized a rule today designed to slash the volume of natural gas that's vented and flared each year into the atmosphere from roughly 100,000 wells on federal and tribal lands. The Methane and Waste Prevention Rule's goal is twofold: Reduce releases of methane, a greenhouse gas that's more than 25 times more potent than carbon dioxide, and ensure that taxpayers get a fair return on the use of federal lands by capturing flared gas that is not subjected to royalty payments. Interior says the new rule — which replaces 30-year-old regulations — is projected to cut methane emissions from the oil and gas sector by as much as 35 percent.