We've already experienced Life Altering Smog, in Los Angeles . We've worked hard to keep it under control. Can we NOT go backwards? I'm old enough to remember Los Angeles and Pittsburgh having completely black skies from industrial pollutants. I'm not aware that the Aerospace industry dumping chemicals in the 50's and 1960's is still a super fund clean up site 60 years later, in Southern California. Why do Republicans call this concern and knowledge, being a whiny baby? We have millions of people living in high density areas. the EPA is not adversely affecting individuals. They are affecting petro chemical industries, shipping, refineries, manufacturing. Keeping them clean, because they sure as hell will not do it on their own.