Delhi-NCR: We all are hearing about stages of GRAP being imposed amid deteriorating air quality of Delhi-NCR but we all wonder what GRAP is. The Commission for Air Quality Management (CAQM) agreed on Sunday to implement an eight-point Stage IV of the graded response action plan (GRAP) in the nation's capital with immediate effect, in addition to all activities under Stages I, II, and III, due to the deteriorating air quality in Delhi-NCR. This occurred when Delhi was covered in a poisonous, oppressive haze for the sixth day in a row., Delhi News, Times Now