Air Quality Worst at Night, Early Morning: The Times of India

“Delhiites may be exposed to the worst air pollution at night and early morning, indicates a study by the Centre for Science and Environment (CSE). CSE chose eight persons and monitored their exposure to pollution for 24 hours using a portable device. It also found that situation in the Lutyens’ zone, where the rich and the powerful reside, is no better despite the greenery and sparse traffic..” The Times of India

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