A) persistent organic pollutants
B) global warming and climate change
C) substances that deplete the ozone layer
D) biosafety genetically modified organisms
Correct Answer: C
Solution :
Worlds major producers are Consumers of pollutants met at Montreal (Canada) on September 16, 1987 to solve the problem of ozone ihining in stratosphere, 24 countries signed the protocol that came into force on Janurary 1, 1989.
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