REGULATION: Colo. is first state to limit methane emissions from oil and gas production Stephanie Paige Ogburn, E&E reporter Published: Tuesday, February 25, 2014 On Sunday, Colorado became the first state in the nation to limit methane emissions from oil and gas operations. Please subscribe to ClimateWire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.