Curbs helped improve Delhi’s air quality by 22 per cent: Study | Delhi News – Times of India


NEW DELHI: An analysis done by Decision Support System (DSS), which has been developed to forecast the sources of local and regional pollution that can impact Delhi’s air, estimated that the pollution level in the city improved by 18-22 per cent last week after Commission for Air Quality Early Warning System for National Capital Region and Adjoining Areas (CAQM) issued many directives on November 16 to control pollution.
Scientists at Indian Institute of Tropical Meteorology (IITM), Pune, which has developed DSS, said air quality could have reached the “severe” category on November 18 and 19, but remained “very poor”.
Sachin Ghude, head of IITM’s air quality forecasting group, tweeted, “Imposing these slew of measures by CAQM managed to improve air quality in Delhi by about 18-22 per cent.” Gaurav Govardhan, another scientist, said, “Apart from forecasting the contribution of different local and regional sources to Delhi’s PM2.5, DSS has different scenarios on the impact on Delhi’s air quality. We conducted our analysis considering the restrictions in a scenario.”
Among the directives were shutting most thermal power plants in a 300km radius; banning entry of trucks not carrying essential commodities and most construction, and ordering work from home for 50 per cent government staff.

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