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Traffic pollution - measuring the real damage Traffic fumes from individual vehicles are decreasing every year as engines become cleaner, but there are more vehicles on the road and the number continues to grow. The long term effects of living in urban areas and breathing in traffic fumes is widely studied, particularly in cities such as Athens and Los Angeles, where there is a lot of sunlight and not much air movement, resulting in photochemical smog from traffic fumes and industrial gases hanging in the air.
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