** FILE ** Los Angeles sit under a blanket of smog in this Jan. 14, 2000, file photo. Pollution standards are too weak to protect people from the air they breathe, EPA Administrator Stephen L. Johnson declared, Thursday, June 21, 2007. Johnson recommended tougher limits on the smog that makes children cough and asthmatics wheeze from Los Angeles to Houston to New York. (AP Photo/Mark J. Terrill, File)