Regarding sulfates, nitrates, organic and elemental carbon in California air, there is good news.
According to information in a Jun. 5, 2018 California Environmental Protection Agency Air Resources Board (ARB) news release, those substances in Golden State air are becoming fewer and farther between.
In the “NASA satellite helps collect 15 years of Southern California air pollution data; results show air pollution controls working: Satellite remote sensing technology informs air quality trends miles from existing urban regulatory monitors in rural, disadvantaged communities” news release, the ARB reports: “Scientists from Emory University, NASA’s Jet Propulsion Laboratory and the California Air Resources Board worked together to analyze satellite data to determine the 15-year trend of fine particle pollution.
