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Hydrocarbons (HC)

Data on pollutant emission inventories and air quality index reported at the ZMCM can be found on the local authority information web page:

  • Historical data of pollution at five specific parts of the city are available for ozone, carbon monoxide, sulphur dioxide, nitrogen dioxide and inhalated particles (PM10) pollution standard indexes (IMECA, Indice Metropolitano de Calidad del Aire), and lead concentration. 1996 data of polluted days above local standards. 1996 data of polluted days above local standards.

  • Characteristics

    • HC is used to describe hydrocarbons suspended in the atmosphere (gas or liquid phase) and mainly produced from incomplete burning processes.

    Main sources

    • Incomplete combustion of fuels and other substances containing carbon.

    • Processing, distribution and use of oil compounds, such as gasoline, diesel, organic solvents etc. Also fires, chemical reactions in the atmosphere and bacterial decomposition of organic matter in the absence of oxygen.

    Main effects

    • Disturbances in the respiratory system. Some hydrocarbons can also cause cancer. Main effect at the ZMCM is the reaction of HC and NOx to form ozone in the presence of sunlight. Specific effects of this pollutant on human health have also been detected.

     


     


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