Climate News Network: Being a traffic policeman in Kolkata is a life-threatening business. Not only are you at risk of being run over on the traffic-clogged roads and streets of this chaotic city of 14 million -- you're also more than likely to suffer from serious health problems due to some of the worst air pollution not just in India, but in the world.
According to a 2012 report by the New Delhi-based Center for Science and Environment on air quality in Kolkata, seven out of every 10 people in the city suffer from...