Discussion
Depletion of ozone of stratospheric zone cause :
Answer: B
Depletion of stratospheric ozone causes skin cancer.
The ozone layer absorbs most of the sun's ultraviolet-B radiation. When it thins, more UV-B reaches the ground, and that radiation damages DNA in skin cells, raising the incidence of skin cancers, including melanoma, as well as cataracts and suppression of the immune system.
A rise in CO2 comes from burning fuels and clearing forests, not from ozone loss. Cholera is a waterborne bacterial disease and dengue a mosquito-borne viral one; neither is caused by ultraviolet exposure.
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