Against smoggy skies, a man walks his daughter across a busy street in central Kolkata. According to the Delhi-based Center for Science and Environment, "18 out of every 100,000 persons in Kolkata fall victim to lung cancer annually. Seven out of 10 people in Kolkata are afflicted with some form of respiratory ailment. Also the percentage of children suffering from upper respiratory infections, cough, wheezing and eye irritation is increasing in direct proportion to the increasing concentration of PM10 [particle pollution]." India. November, 2013
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