The national capital, Delhi, woke up to a thick sheet of smoke on Tuesday as air quality index tops 500 in several areas. The ground realities were so poor that visibility in many areas is limited not more than 8-10 feet. According to SAMEER, the air monitoring app of the Central Pollution Control Board (CPCB), the air quality index (AQI) in Delhi-NCR areas was recorded 500 which is “severe” category