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What is the main source of volatile organic compounds (VOCs) that contribute to the formation of smog?
Industrial emissions
Vehicle exhaust
Agricultural activities
Forest fires
Answers (1)
The main source of volatile organic compounds (VOCs) that contribute to the formation of smog varies depending on the region and time of year. However, in most urban areas, the largest sources of VOCs are transportation-related emissions, particularly from vehicle exhaust.
When VOCs and nitrogen oxides are emitted from vehicles, they react with sunlight and form ground-level ozone, which is a major component of smog. Other sources of VOCs include industrial processes, such as painting and coating operations, as well as consumer products such as solvents, cleaners, and personal care products.
While agricultural activities can also contribute to VOC emissions, particularly from the use of pesticides and fertilizers, and forest fires can release large amounts of VOCs into the atmosphere, transportation-related emissions remain the most significant source of VOCs in urban areas. Therefore, reducing vehicle emissions through measures such as promoting public transportation, encouraging the use of electric or hybrid vehicles, and reducing idling can help reduce VOC emissions and improve air quality.
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