Teaching Punjab Pre Primary Teacher Test Series 2020 General Knowledge Ecology and Environment Environmental pollution

खालीलपैकी कोणते दुय्यम प्रदूषक आहे?

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धुरके
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कार्बन डाय ऑक्साइड
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कार्बन मोनो-ऑक्साईड
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उडती राख
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