महासागरो में पाये जाने वाल – McqOptions

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1.	महासागरो में पाये जाने वाले प्रवाल भित्तियों के विरंजन का कारण है -
A.	अम्ल वर्षा
B.	ओजोन क्षरण
C.	जल प्रदूषण
D.	ग्लोबल वार्मिंग
Answer» E.

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