Lung cancer & DNA breakage are the major ill effects of excessive ozon – McqOptions

MCQOPTIONS

1.	Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of
A.	CO₂
B.	SO₂
C.	hydrocarbons
D.	CFC (chloro fluoro carbon)
Answer» E.

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