Which of the following metals acts as a pollutant?
Correct answer: D. All of the above
- A. Hg (Mercury)
- B. Pb (Lead)
- C. Cd(Cadmium)
- D. All of the above
Explanation
Mercury, lead, and cadmium are all heavy metals that are toxic to living organisms even at low concentrations. They are persistent environmental pollutants that can be released from various industrial activities.
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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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