railway RRB JE (CBT I + CBT II) Mock Test 2024 General Knowledge Ecology and Environment Environmental pollution

जीवाश्म ईंधन बहुत सारे _______ का कारण बनता है।

1
ऊर्जा
2
प्रदूषण 
3
परिवहन
4
संरक्षण
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