Raising concern over deteriorating Air Quality Index (AQI), the principal bench of National Green Tribunal (NGT) has directed the Chief Secretaries of the States where the Index has dipped to severe, very poor and poor, to take immediate remedial action and submit an action taken report.Chairperson Prakash Shrivastava, Justice Sudhir Agarwal and Dr. A. Senthil Vel took suo moto cognizance of...