Why does some smog look grey and others look brown?



  1. 0 Votes

    The color of smog is affected by what it is made up of. Nitrous Oxides are yellow in color and are responsible for the brown colored smog. This is known as photochemical smog. This happens to certain pollutants under the affect of sunlight. Ozone when produced this way is a photochemical smog.

    Industrial smog often contains higher amounts of Sulfur Dixides and acids. Sulfur Dioxides on the other hand are colorless and look grey. The reason the color we see is darker than the color of the colorant is because we are looking through many layers at one time.

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