New Delhi has already been ranked the world’s worst polluted city by the World Health Organization, but a new study by U.S. and Indian scientists shows that the city’s air quality is far worse than previously thought.
American scientist Joshua Apte, working with partners from the University of California, Berkeley and Delhi’s Indian Institute of Technology, roamed the streets of the Indian capital in an autorickshaw laden with air pollution monitors. He found that average pollution levels were up to eight times higher on city roads, the Associated Press reports.
Apte compared the readings from his road trips to readings at urban background sites, which he says are already extremely high. The levels of PM 2.5, the particle known to be most harmful to human health, were found to be 50 percent higher on Delhi’s roads during rush hour than during ambient air quality readings. Black carbon, a major pollutant…
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