EPA's scientific justification for its 2008 ozone standard faces broad attacks in ongoing litigation, with industry and some states claiming the agency erred by concluding the data warranted tightening the existing ozone limit, while activists and other states say data on ozone's health impacts show the need for an even stricter limit. In State of Mississippi, et al. v. EPA , pending before the U.S. Court of Appeals for the District of Columbia Circuit, industry and the state of Mississippi...