A) To think over ozone layer depletion in stratosphere
B) To increase oxygen in atmosphere
C) To encourage agriculture
D) To use solar energy
Correct Answer: A
Solution :
In 'Earth summit' held in 1992 in Rio-de-Janeiro (Brazil), the whole world has adopted a proposal to stop use of CFC by the end of 2000. CFC is strong enemy of ozone and cause depletion of ozone layer.
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