India, most polluted nation in the world?

I recently came across a news article that reports that one of the Indian city is the most polluted and it is hurting the ozone layer! How sad. The fast urbanization of the country is hurting the atmosphere big time.
There is absolutely no government control over the vehicles which are polluting the skies in India. It is a serious problem, not just for India but whole world. It's high time we address this serious issue.