SMOG?

A mixture of pollutants, principally ground-level ozone, produced by chemical http://www.gbuapcd.org/Images/clipart/pollutioncomplaint1.jpgreactions in the air involving smog-forming chemicals. A major portion of smog-formers comes from burning petroleumbased fuels such as gasoline. Other smog-formers, volatile organic compounds, are found in products such as paints and solvents. Smog can harm health, damage the environment and cause poor visibility. Major smog occurrences are often linked to heavy motor vehicle traffic, sunshine, high temperatures and calm winds, or temperature inversion (weather condition in which warm air is trapped close to the ground instead of rising).

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