With reference to “The big fuss about BS-IV vehicles” (April 24), the article made interesting reading since it came from an auto industry legend. Yes, we all in a sense have directly linked the pollution levels of Delhi with vehicular emission rather than trying to understand and address other contributors. Since auto dealers didn’t have much of an option, they sold most of their stocks with heavy discounts, taking a hit to their bottom line. They should have been allowed to sell these beyond the March as anyhow manufacturers were making BS-IV vehicles and they were only worried about old