Polluted air has high concentrations of particulate matter (PM). They are around 10 micrometres (PM10) or 2.5 micrometres ...

Sibes Kumar Das, the head of respiratory medicine at Medical College, Kolkata, said the department witnessed aoriund 25 per ...

According to the National Air Quality Index, prepared by the Central Pollution Control Board (CPCB), “very poor” air can cause “respiratory illness on prolonged exposure”. The index mentions that ...

Kolkata's air quality significantly improved on the last day of January, with most areas reaching 'satisfactory' AQI levels due to a rise in temperatu ...