Neighbourhood News Desk: Sudden haze descended upon Delhi and its neighbouring areas on Tuesday as the air quality plummeted into the severely polluted category, bringing back memories of November when the city’s air reached dangerous levels of pollution. Pollution on Tuesday was driven by dust particles classified as PM10, which are roughly a fifth of the width of a human hair. From 138 at 6pm on Sunday evening, the PM10 concentration index shot up to 433 at 8pm on Tuesday, a trend that experts attributed to a switch of wind direction.
Air pollutants such as particulate matter trigger allergies, cough, lung infections, heart disease and even irreversible lung damage. Dust pollution has been uncharacteristically high this summer, which has recorded several storms.Delhi is not the only city to be affected. The AQI shot up in Gurugram, Noida and Ghaziabad. While in Ghaziabad the 24-hour average AQI was recorded to be 333, in Noida and Gurugram it was 342 and 308 respectively.