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As noted elsewhere in this web site, a VOC is an organic chemical (containing carbon) which can evaporate and remain in the atmosphere. While these materials float in the atmosphere the VOCs react with sunlight and can contribute to smog in cities. However, to be a harmful VOC the organics must have a significant atmospheric…

Volatile Organic Compounds (VOCs) are the primary sources of low-altitude smog. “Organic” means the chemical contains carbon atomas and that usually means it comes from something that used to be alive; “Volatile” means it evaporates quickly; “Compound” means it’s a complex molecule containing many ingredients and not just a simple element.VOCs contribute to smog in…