NRC: SMOG CONTROL EFFORTS OFF MARK

The National Research Council says U.S. regulatory programs to control smog may have been misdirected the past 20 years, and more emphasis needs to be placed on limiting nitrogen oxide emissions. An NRC study said ozone control efforts have focused mainly on controlling volatile organic compounds (VOC) emissions. "However, in many parts of the country controlling emissions of nitrogen oxides would be more effective," it said, noting VOCs and nitrogen oxides are precursors of ozone.