Ozone hole refers to
Correct answer: B. Reduction in thickness of ozone layer in stratosphere
- A. Hole in ozone layers
- B. Reduction in thickness of ozone layer in stratosphere
- C. Reduction of thickness of ozone in troposphere
- D. Increase concentration of ozone
Explanation
The term "ozone hole" refers to a significant reduction in the thickness or concentration of ozone in the stratosphere, particularly over the polar regions. This phenomenon is most notable over Antarctica, where the ozone layer has been observed to thin significantly during certain periods.
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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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