AIR POLLUTION: D.C. Circuit rejects industry challenge to EPA, Calif. nonroad engine standards Jeremy P. Jacobs, E&E reporter Published: Friday, January 31, 2014 Federal judges today rejected a challenge from the makers of nonroad engines to U.S. EPA air regulations. Please subscribe to Greenwire 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.