A new method that analyzes the effect of emissions controls on visibility was applied to conditions in Claremont, CA. Claremont has a severe smog problem and therefore was an ample location to test the new analytical method.
First, some background on the visibility impairment caused by smog:
* Visibility impairment looks like either a brown discoloration at the horizon or a nearly opaque white haze.
* Light scattering and absorption by airborne particles, as well as light absorption by nitrogen dioxide (NO2) cause visibility impairment.