India, Dec. 12 -- As the national Capital reels under the impact of an increasingly toxic air quality and once again questions are being raised about the measures taken to curb air pollution in Delhi-NCR, one of the decisions taken by the National Green Tribunal (NGT) in April 2015 comes to mind. The tribunal passed an order prohibiting 15-year-old petrol vehicles and 10-year-old diesel automobiles from plying and asked for them to be pulled off the roads with immediate effect. The ban took the nation, particularly Delhiites, by surprise as the national Capital was one of the first cities to be chosen for its implementation. The prohibition impacted over 37 lakh of Delhi's one crore registered vehicles, much to the chagrin of owners who w...