what do you mean by ozone hole
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Answer:
a region of marked thinning of the ozone layer in high latitudes, chiefly in winter, attributed to the chemical action of CFCs and other atmospheric pollutants. The resulting increase in ultraviolet light at ground level gives rise to an increased risk of skin cancer
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It's a layer which protects the earth from the U-V rays.....
Due to pollution the ozone layer became thin and soon it will be unprotectable...
So grow more and more trees
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