Which control measure usually provides the most direct reduction of air pollution at its source?
Correct answer: B. Using a cleaner fuel
- A. Diluting emissions with taller stacks
- B. Using a cleaner fuel
- C. Monitoring ambient temperature
- D. Increasing chimney height
Explanation
Using a cleaner fuel reduces the pollutant generation rate before the exhaust reaches the atmosphere. A taller stack may improve dispersion but does not reduce the total mass of pollutants emitted.
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Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
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