Meanwhile, a recent analysis conducted by the independent think tank, Centre for Research on Energy and Clean Air (CREA) shows Delhi as the most polluted city in India for the month of October, with an average PM2.5 level of 111 micrograms per cubic metre.

India's capital territory of Delhi is keen to use artificial rain to fight air pollution this year, its Environment Minister Gopal Rai said on Tuesday, as deteriorating air quality in the region led to an increase in respiratory illnesses.

Delhi Environment Minister Gopal Rai held a review meeting on Tuesday with officials at the Delhi Secretariat to assess the steps taken to combat the escalating pollution levels in the national capital.