Mumbai, Feb. 15 -- A frank policy document is usually a contradiction in terms in India. Problem statements are given short shrift, achievements-especially those of the government of the day-are trumpeted, challenges are almost never addressed with any degree of transparency, failures are sought to be erased from public memory, learnings are ignored. If data is massaged, no one except the expert will know. There was a desperate need for frankness in the National Clean Air Policy (NCAP), unveiled in January, following a string of alarming reports about the quality of air in Indian cities, led by the national capital Delhi, and its gory health implications. The National Clean Air Policy lays down the road map for Indian cities to clean up the...