Which Indian city has huge machines which pump fresh air into the atmosphere?
A
Goa
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B
Delhi
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C
Hyderabad
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D
Kolkata
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Solution
The correct option is B Delhi Delhi is one the most polluted city in India. Surrounded with the web of automobiles running on petroleum products , which is affecting the atmosphere badly. India's capital Delhi sit refrigerator sized machines also known as oxygen purifiers . They suck in the brew of pollutants belched from the vehicles and pump out the fresh air.