कोविड-19 के कारण मानव समाज में आए सकारात्मक परिवर्तन कौन-कौन से हैं और आप इसे सकारात्मक क्यों कहते हैं
Answers
Answered by
3
Answer:
- pollution kam ho gya. ok
Answered by
2
Answer:
1.pollution decreased
2.population decreased
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