state gov UPSSSC Van Daroga Mock Test 2022 People Development & Environment Environmental Issues Pollution

खालीलपैकी कोणते वायू प्रदूषक नाही?

1
पराग धूळ
2
क्षोभावरणीय ओझोन
3
सल्फरचे ऑक्साइड
4
अरगॉन
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