Order of the National Green Tribunal in the matter of Vardhaman Kaushik Vs. Union of India & Others dated 09/11/2017 regarding the deteriorating air quality of Delhi NCR. National Green Tribunal in the Order said that the Judgement of the NGT dated 10th November, 2016 had "clearly postulated the steps that were required to be taken on long term and short term basis keeping in view the precautionary principle to ensure that the ill-effects and adverse impact of polluted ambient air quality in the previous year is not repeated in the year 2017.