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How Smog Is Formed

Discussion in 'General Discussion' started by flutterby, Jul 21, 2017.

  1. flutterby

    flutterby Active Member



    • Nitrogen Oxides (car exhaust) combine with noxious 'volatile organic compounds' plus sunlight = ground level ozone
     
  2. flutterby

    flutterby Active Member

    Big surprise: 'photochemical' smog eats up oxygen and turns it into ozone which you cannot breathe.


    So in areas of high air pollution, there is a compounding effect because of lowered oxygen levels
     
  3. flutterby

    flutterby Active Member

    Does Smog trap heat in cities leading to ground-warming that does not dissipate normally?
     
  4. flutterby

    flutterby Active Member

    www.conserve-energy-future.com/smogpollution.php

    " Smog which occurs mainly because of air pollution, can also be defined as a mixture of various gases with dust and water vapor. Smog also refers to hazy air that makes breathing difficult.

    It is purely caused by air pollution. Ground level ozone and fine particles are released in the air due to complex photochemical reactions between volatile organic compounds (VOC), sulphur dioxide (SO2) and nitrogen oxides (NOx). These VOC, SO2 and NOx are called precursors. The main sources of these precursors are pollutants released directly into the air by gasoline and diesel-run vehicles, industrial plants and activities, and heating due to human activities.

    Smog can be responsible for any ailment from minor pains to deadly pulmonary diseases such as lung cancer. Smog is well known for causing irritation in the eye. It may also result in inflammation in the tissues of lungs; giving rise to pain in the chest. Other issues or illnesses such as cold and pneumonia are also related to smog. The human body faces great difficulty in defending itself against the harmful effects of smog.
     
  5. flutterby

    flutterby Active Member

    How Catalytic converters affixed to automobile tailpipes and industry smoke stacks help to reduce smog:

    https://explorecuriocity.org/Explor...ytic-converter-and-how-does-it-work-1779.aspx

    "
    In order to reduce air pollution, modern automobiles are equipped with a device called a catalytic converter that reduces emissions of three harmful compounds found in car exhaust:

    • Carbon monoxide (a poisonous gas)
    • Nitrogen oxides (a cause of smog and acid rain)
    • Hydrocarbons (a cause of smog)
    These are converted into less harmful compounds before leaving the car’s exhaust system. This is accomplished using a catalyst, which gives the device its name."

    -paradoxically, catalytic converters do not work as well for diesel engines

    "However, catalytic converters are less efficient when used with diesel engines, which run colder than gasoline engines."
     
  6. Elmware

    Elmware Full Member

    I thought Vancouverites called it "haze."
     

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