engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) People Development & Environment Hazards and Disasters

भारत में हाइड्रोकार्बन वायु प्रदूषक का प्रमुख स्रोत है

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जेट हवाई जहाज
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ऑटोमोबाइल
3
पौधे
4
गंदे नाले
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