New Delhi, May 16 -- The air quality around India Gate deteriorated to an AQI of 249 on Friday, according to data from the Central Pollution Control Board (CPCB), as Delhi and parts of the National Capital Region (NCR) continued to grapple with the aftermath of a thick haze that blanketed the region for nearly 11 hours from late Wednesday night to Thursday morning. The dense layer of dust severely impacted visibility and pushed pollution levels to hazardous highs.At the Indira Gandhi International Airport, visibility plummeted dramatically from 4,500 metres at 10pm on Wednesday to just 1,200 metres by 11:30pm, according to data from the India Meteorological Department (IMD). The sharp decline was attributed to dust-laden winds blowing in ...