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  • https://www.findlaw.com/traffic/drivers-license-vehicle-info/state-emissions-standards-and-testing.html

    Smog Laws by State - FindLaw

    California Emissions Standards ・ Colorado ・ Connecticut ・ Delaware ・ Maine ・ Maryland ・ Massachusetts ・ New Jersey ・ New Mexico (2011 model year and later); New ...

  • https://www.canada.ca/en/environment-climate-change/services/air-pollution/issues/smog-causes-effects.html

    Smog: causes and effects - Canada.ca

    Smog refers to a noxious mixture of gases and particles that often appears as a haze in the air. It has been linked to a number of adverse ...

  • https://ogg.osu.edu/media/documents/health_lit/WRRSMOG_Readability_Formula_G._Harry_McLaughlin__1969_.pdf

    SMOG Grading —– a New Readability Formula

    This gives the SMOG Grade, which is the reading grade that a person must have reached if he is to understand fully the text assessed. 639. Go To SMOG Calculator.

  • https://earthjustice.org/feature/soot-smog-air-map-united-states-county

    Mapping Soot and Smog Pollution in the United States - Earthjustice

    Mapping Soot and Smog Pollution in the United States. Under the Clean Air Act, the U.S. Environmental Protection Agency must set standards that ...

  • https://study.com/academy/lesson/video/photochemical-smog-definition-formation-effects.html

    Video: Photochemical Smog | Definition, Causes & Effects

    Explore photochemical smog. Learn the definition of smog and understand what causes photochemical smog. Find what photochemical smog is made of and...

  • https://www.epd.gov.hk/epd/english/environmentinhk/air/prob_solutions/vocs_smog.html

    Volatile Organic Compounds and Smog

    Under sunlight, VOCs react with nitrogen oxides emitted mainly from vehicles, power plants and industrial activities to form ozone, which in ...

  • https://www.pnnl.gov/science/highlights/highlight.asp?id=4098

    PNNL: The Color of Smog

    Scientists at Pacific Northwest National Laboratory determined that high concentrations of nitrogen oxides influence the creation of the brown haze that ...

  • https://www.britannica.com/science/sulfurous-smog

    Sulfurous smog | air pollution - Britannica

    Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing ...

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