Changes in the emissions of SO2 and NOx caused by the Clear Skies Act will change the level of visibility in much of the U.S by reducing concentrations of sulfate and nitrate particles.
Progress on reducing concentrations of sulfate has been better than predicted.
mnli hypothesis: Progress on reducing concentrations of sulfate has been better than predicted. premise: Changes in the emissions of SO2 and NOx caused by the Clear Skies Act will change the level of visibility in much of the U.S by reducing concentrations of sulfate and nitrate particles.