New Delhi, Nov. 12 -- It is well known that Delhi's air pollution problem has developed over a few decades. Though in earlier times it was restricted to the winter season, it has now emerged as a serious year-round environment and public health challenge.

In the late 90s and early 2000 the introduction of CNG did make a difference, however it was short lived as many other factors also got amalgamated in increasing the annual scourge.

A Regional Catastrophe

The problem was earlier being addressed as a localised issue with particular reference to Delhi, Gurugram, Faridabad, Ghaziabad and such neighbouring townships. However, it soon emerged as a regional catastrophe engulfing the National Capital Region (NCR) as being part of a larger ai...