AQI ‘very poor’ at 7 stations before rain clears poison | Kolkata News
Showers brought some respite Kolkata: Kolkata gasped through another night of toxic air as unabated firecracker bursting on Monday pushed the PM2.5 pollution index into the ‘very poor’ category at all seven monitoring stations between 2 am and 4 am on Tuesday. The fresh onslaught, coming barely 24 hours after Kali Puja night witnessed an…