India, Oct. 29 -- Air quality in Gautam Budh Nagar worsened on Wednesday with all three major cities-Noida, Greater Noida, and Ghaziabad- recording "poor" air, according to the Uttar Pradesh Pollution Control Board (UPPCB).

According to official bulletin, AQI of Noida was 247 while 220 in Greater Noida and 213 in Ghaziabad.

The Central Pollution Control Board (CPCB) classifies an AQI of 0-50 as "good", 51-100 as "satisfactory", 101-200 as "moderate", 201-300 as "poor", 301-400 as "very poor" and 401-500 as "severe".

The air worsened a day before a forecast of light rain and thunderstorms across parts of Delhi- NCR, which could bring a temporary change in weather conditions but may not necessarily translate into sustained improvement in...