FILE - This Jan. 23, 2013, file photo, shows a poor air quality warning is posted over a highway Wednesday, Jan. 23, 2013, in Salt Lake City. A powerful state board is moving to require emissions controls on smoky char broilers at hamburger joints. Other measures set to take effect in northern Utah this year will force changes in everyday products, from oven cleaners to aerosol deodorants and hair spray. It's all part of a comprehensive plan to curb smog that hangs over the greater Salt Lake region. (AP Photo/Rick Bowmer, File)
