The Automotive Aftermarket Industry Association (AAIA) has joined with the National Association of Manufacturers (NAM) and 11 other groups to move to intervene in a lawsuit brought by the Sierra Club over the Environmental Protection Agency’s (EPA) regulation of ozone.

The Sierra Club and other environmental groups filed the suit to force EPA to complete its review and revision of the national ambient air quality standards (NAAQS) for ozone by September 2014.