Why has smog descended on New Delhi and when will it leave? | REUTERS

Smog caused a sharp drop in visibility in Delhi this week, and in other parts of northern India, such as the states of Punjab and Uttar Pradesh, visibility fell to zero. Here's a look at how far it has spread. #newdelhi #delhi #pollution #smog #aqi #News #Reuters #Newsfeed Read the story here: https://reut.rs/4hLXwBs 👉 Subscribe: http://smarturl.it/reuterssubscribe Keep up with the latest news from around the world: https://www.reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en