Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?
Correct answer: A. SO2
- A. SO2
- B. Hg
- C. NOx
- D. F
Explanation
Sulfur dioxide is commonly emitted when sulfur-containing fuels or ores are burned or roasted, making it characteristic of smelters and thermal power plants and also present in cement-plant emissions. NOx, mercury and fluorides can occur, but are not the common pollutant across all three listed sources.
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