Noida AQI 426 `Severe`: India`s 2nd Most Polluted; GRAP III Bans C&D & BS3/BS4 Vehicles

Noida AQI hit 426 (Severe), making it India's 2nd most polluted. GRAP Stage III bans non-essential C&D and BS-III/BS-IV vehicles. Reports flag poor enforcement across Gautam Buddh Nagar.