There will be 200 operational airports in India by 2040, with two each in the top 31 cities, that's the stated goal of the current government, to meet the rapidly growing passenger traffic in India which is expected to cross 1 billion by 2040. CNBC-TV18 spoke to experts to review India's airport infrastructure and find how far behind the curve are we, and what will it take to get to that number of 200 operational airports by 2040 from the current 75.