India, Nov. 14 -- LUCKNOW After a brief improvement, Lucknow's air quality worsened again, entering the 'poor' category, with the overall air quality index (AQI) touching the 204 mark on Thursday, according to the Central Pollution Control Board (CPCB). The return of haze and rising concentration of PM2.5 and PM10, the most harmful pollutants, made outdoor movement discomforting, particularly during early morning and late evening hours.

Data from all six live monitoring stations across the city showed the air quality hovering between the 'poor' and 'moderate' categories. Talkatora industrial area (280) and Lalbagh (256) recorded the highest pollution levels, followed by Kendriya Vidyalaya in Aliganj (230). In comparison, Gomti Nagar (176...