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You live in a city with a strong petrochemical industry. Every time you pass through a certain part of town, you smell a noxious odor. Even though the air is regulated by the state you suspect that the companies are…

“Volatile organic chemicals (VOCs) are emitted as gases from certain solids or liquids. VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects. Concentrations of many VOCs are consistently higher indoors (up to…