Teaching Tripura TET Mock Test (Paper 1 & Paper 2) General Knowledge Ecology and Environment Environment Problems

अम्लीय वर्षा का मुख्य कारण है

1
वायु प्रदुषण
2
जल प्रदूषण
3
मृदा प्रदूषण
4
इनमे से कोई भी नहीं
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