Air pollution over northern India has plummeted to a 20-year-low for this time of the year, according to satellite data published by US space agency National Aeronautics and Space Administration...
source https://www.ndtv.com/india-news/as-people-stay-home-air-pollution-in-north-india-at-20-year-low-nasa-2216600
source https://www.ndtv.com/india-news/as-people-stay-home-air-pollution-in-north-india-at-20-year-low-nasa-2216600
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