Order of the National Green Tribunal in the matter of Subhas Datta Vs State of West Bengal & Others dated 27/11/2018 regarding the alarming adverse air quality of Kolkata City which was stated to be highly polluted during the period commencing from mid-October to February end. The principal reason for the bad ambient air quality in the city of Kolkata and Howrah was identified to be auto emission apart from road dust, construction activities, burning of municipal waste and industrial wastes including plastics, population of DG sets and industrial emissions.