Get latest articles and stories on India at LatestLY. The National Green Tribunal has directed the Delhi chief secretary to explain why coercive and penal measures be not taken for "blatant failure" of the authorities in protecting the water quality of the Yamuna by preventing discharge of pollutants into the river. India News | NGT Asks Delhi CS to Explain Why Coercive Action Be Not Taken for Failure to Control Yamuna Pollution.