According to air quality levels measured in 2014 by the World Health Organization (WHO) in 1,600 different cities around the globe, the Indian capital city of New Delhi was found to be the worst, with air pollution 10 times higher than acceptable levels. The city was found to have the highest levels of particulate matter, also known as PM 2.5, known to be most harmful to human health. Air pollution is the country’s leading cause of premature death with an estimated 620,000 people dying in India each year from pollution-related diseases.

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