The first ever quantitative assessment of nitrogen pollution in India says that nitrogen makes up for the largest fraction of PM2.5.
Only a dozen states and union territories have adopted the Energy Conservation Building Code, which was released in May 2007.
The PM2.5 annual average level in Mumbai that was 70 µg/m3 (micrograms per cubic metre) in 2016 dropped to 60 µg/m3, said an analysis released by System of Air Quality Weather Forecasting and Research.