AIR POLLUTION: Businesses urge Pa. coke plant to clean up emissions Published: Friday, March 21, 2014 Several community organizations are pushing Pennsylvania regulators to crack down on an Allegheny County, Pa., coke plant. 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.