Which compound is not included under the main list of criteria for air pollutants?
Correct answer: B. CO2
- A. NO2
- B. CO2
- C. O3
- D. SO2
Explanation
While carbon dioxide (CO2) is a major greenhouse gas and a significant factor in climate change, it is not regulated as a "criteria" air pollutant in the same way as pollutants like NO2, ground-level O3, and SO2, which have more direct, immediate health effects.
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About Environmental Chemistry
Atmospheric pollution includes smog, acid rain, greenhouse gases, ozone depletion and the effects of carbon monoxide, sulfur oxides, nitrogen oxides and particulate matter. Water pollution covers sewage, industrial waste, eutrophication and treatment stages, while green chemistry focuses on reducing hazardous substances, waste and energy use through safer, more efficient processes.
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