Smog is blanketing parts of South Asia, including the Indian capital New Delhi. As NPR's Diaa Hadid reports, it is making people sick and has triggered a ban on a beloved street snack. (SOUNDBITE OF ...
* Nearly one-third of Delhi's PM2.5 pollution comes from an invisible chemical called ammonium sulfate * This pollutant forms in the air through reactions, not direct emissions, making //it harder to ...
Get More information on Air Pollution including breaking news and opinion. Check News articles, photos, videos of Air ...
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