Patna

Patna /ˈpætnə, ˈpʌt-/ is the capital and largest city of the state of Bihar in India. Patna is the second largest city in eastern India after Kolkata. It had an estimated population of 1.68 million in 2011, making it the 19th largest city in India

Amount of Toxic Air Recorded at Jan 2016 is 388