U.S. officials have announced a record $241 million settlement with Marathon Oil over alleged air pollution violations at dozens of the company's oil and gas facilities on the Fort Berthold Indian Reservation in North Dakota. The settlement, part of an ongoing crackdown on environmental violations, includes a civil penalty of $64.5 million for Clean Air Act violations. The Environmental Protection Agency (EPA) and the Justice Department were involved in reaching this agreement. The settlement also mandates environmental equipment upgrades at Marathon Oil's facilities to address the violations.