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  2. Photochemical smog - Wikipedia

    en.wikipedia.org/wiki/Smog

    Photochemical smog, as found for example in Los Angeles, is a type of air pollution derived from vehicular emission from internal combustion engines and industrial fumes. These pollutants react in the atmosphere with sunlight to form secondary pollutants that also combine with the primary emissions to form photochemical smog.

  3. Pollution in California - Wikipedia

    en.wikipedia.org/wiki/Pollution_in_California

    A view of Los Angeles covered in smog. Pollution in California relates to the degree of pollution in the air, water, and land of the U.S. state of California.Pollution is defined as the addition of any substance (solid, liquid, or gas) or any form of energy (such as heat, sound, or radioactivity) to the environment at a faster rate than it can be dispersed, diluted, decomposed, recycled, or ...

  4. 1966 New York City smog - Wikipedia

    en.wikipedia.org/wiki/1966_New_York_City_smog

    Photochemical smog arrived in modern cities in the 1940s and 1950s with the popularization of motor vehicles and development of new power plants. [5] May 1973 photo of East River and Manhattan skyline in heavy smog. London smog and Los Angeles smog are not exclusive to their namesake cities by any means.

  5. Los Angeles smog woes worsen as U.S. EPA threatens to ... - AOL

    www.aol.com/news/los-angeles-smog-woes-worsen...

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  6. Arie Jan Haagen-Smit - Wikipedia

    en.wikipedia.org/wiki/Arie_Jan_Haagen-Smit

    He started his air pollution research in 1948, when Southern California residents suffered stinging eyes and respiratory irritation from smog. [3] His original interest stemmed from damage to crop plants smog was causing in the Los Angeles Basin, and he had received many requests from government agencies to investigate air pollution.

  7. Los Angeles air quality improves from wildfires' hazardous levels

    www.aol.com/news/los-angeles-air-quality...

    Air quality in wildfire-stricken Los Angeles improved on Thursday from hazardous peaks hit earlier this month, as tiny soot particles that can penetrate the lungs and brain dropped to moderate ...

  8. Smog check cheaters busted, feds say; California ring ... - AOL

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  9. Ground-level ozone - Wikipedia

    en.wikipedia.org/wiki/Ground-level_ozone

    Ground-level ozone is both naturally occurring and anthropogenically formed. It is the primary constituent of urban smog, forming naturally as a secondary pollutant through photochemical reactions involving nitrogen oxides and volatile organic compounds in the presence of bright sunshine with high temperatures. [35]