Question

11. Which of the following phenomenon refers to 'ozone holo"?
(a)Absorption of carbon dioxide by plants.
(b)Concentration of ozone as a whole
(c)Much larger, seasonal decrease in stratospheric ozone over polar regions of carth
(d) None of these
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Answer 1

Answer:

Each year since the late 1970s, much of the protective layer of stratospheric ozone above Antarctica has disappeared during September, creating what is popularly known as the ozone hole. The Antarctic hole now measures about 9 million square miles, nearly the size of North America.