Kolkata pips Delhi to become India's most polluted metro city

In the last past 72 hours Kolkata witness rapid rise in air pollution. Following which Kolkata steal Delhi's crown of the most polluted metro city in the country. Comparing the pollution data at the two stations in Kolkata- Rabindra Bharti University(RBU) and Victoria Memorial Hall- with Ashok Vihar, on the Delhi's most polluted area, shows that Kolkata's AQI has been constantly that of the New Delhi.