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According to the Central Pollution Control Board (CPCB), the air quality index at Akshardham and India Gate reached 269 and 218 respectively.
Experts said the yellow smoke hanging over the city is smog – a mixture of fog and pollutants that reduces visibility and poses serious health risks, especially to vulnerable groups.
According to IMD’s decision support system, Delhi’s transport sector contributed about 15.9% to PM2.5 levels, while stubble burning contributed about 6% and emissions from Delhi residents about 4%.
Climate experts have blamed the increase in pollution on meteorological conditions, which trap pollutants near the surface.
“The drop in minimum temperatures helps form the haze layer as pollution settles in the lower atmosphere,” said Mahesh Palawat, vice president of meteorology and climate change at Skymet Weather.
Neighboring cities like Ghaziabad and Noida contributed 10 and 6% respectively to the pollution, while other regional sources together contributed more than 22%.