That leaves the region with a narrower set of tools. "Maricopa County has never had large smokestack industries," Gates told ...

With bipartisan leadership and cooperation between the U.S. and Canada, acid levels slowly reduced, and recent samples ...

"Maricopa County has never had large smokestack industries," Gates told the EPA. "A majority of ozone forming pollution is not coming from industrial sources in the county but from mobile and non ...

Karen Clay: Our second main finding is that the higher lead concentration increases deaths from a variety of causes: low ...

soot pollution and a “good neighbor” rule intended to restrict smokestack emissions that burden downwind areas with smog. The EPA also targeted a clean water law that provides federal ...