Select the correct answer:
a) Excessive release of carbon dioxide in the atmosphere is the cause of
i) Depletion of ozone
ii) formation of the polar vortex
iii) global warming
iv) formation of smog
b) Inhalation of air polluted with carbon monoxide is dangerous because:
i) CO combines with O2 dissolved in the blood.
ii) CO combines with hemoglobin of blood.
iii) CO removes water from the body and causes dehydration.
iv) CO causes coagulation of proteins in the body
c) A decrease in the amount of ozone in the stratosphere is called depletion of the zone and it is caused by
i) UV radiations of the sun
ii) Use of CFC compounds
iii) excessive use of detergents
iv) Use of polychlorinated biphenyls
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