Which of the following represents an anthropogenic (manmade) source of air pollution ?
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Answer: A. Automobile exhaust
Explanation
Automobile exhausts are anthropogenic air pollution sources created by human transport activities. Internal combustion engines burn fossil fuels, releasing carbon monoxide and nitrogen oxides. Human transportation networks contribute substantial pollutant loads to urban atmospheric environments. Anthropogenic emissions stem directly from human industrial, agricultural, and transportation practices. Vehicle tailpipes emit unburned hydrocarbons, particulates, and various toxic combustion gases. Urban air quality management focuses heavily on controlling mobile source emissions.
Government regulations mandate catalytic converters on vehicles to reduce anthropogenic exhaust pollution. Cities promote public transit to decrease the total volume of automobile emissions. Traffic congestion worsens local air quality by concentrating vehicle exhaust in streets. Option B forest fires represent natural pollution sources rather than human activities. Option C bacterial action occurs naturally in ecosystems without direct human generation. Option D is incorrect because options B and C are natural sources.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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