निम्नलिखित में कौन वायु प्रदूषण का स्रोत नहीं है (a) कारखाना उत्सर्जन (b) वृक्षारोपण (c) कचरे को जलाना (d) लकड़ी का जलाना
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13
Answer:
b.) is the correct option
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0
Explanation:
kaekhana,utsarjan,kachre ko jlana,lakdi ka jlana
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