"Fog Cleans Air Pollution"

When we think of fog, we imagine walking or driving around blinded by it, mysterious objects and creatures crossing our roads, the whole image resembling a nightmare. But, we are told by a song to "always look on the bright side of life", and Jeffrey Collett, the atmospheric chemist of Colorado State University does just this: he shows us evidence that fog is not a bad thing at all. Radiation fog, in fact, cleans the air of pollution by capturing the floating particles that cause us to breathe heavily and sneeze, and bringing them to the ground. As a result of this, the air becomes (relatively) clean again. This article describes profoundly this self-healing procedure Mother Nature came up with a long time ago.

http://www.sciencedaily.com/videos/2005/0604-fog_cleans_air_pollution.htm

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