The winter season has drawn to a close, but it has left alarm bells clanging. A new analysis by the Centre for Science and Environment, of winter air pollution trends in Delhi-NCR, says that while there had been a minor drop in the seasonal level compared to previous winters, the level is still extremely high, and far from meeting the safety standards. To get full access to this report, "Subscribe Now", in just Re.1/- for the next 24 hours.