The Air quality Index (AQI) which was at moderate to slightly unhealthy levels across the country has got better in the past 24 hours, Sarath Premasiri, Director, Environmental Studies & Services Division of the National Building Research Organisation (NBRO), said.

During the past two weeks, the AQI was not healthy except for in a few cities such as Nuwara Eliya, Kurunegala, Vavuniya, Kandy, Kegalle, Kalutara and Monaragala, but there has been an improvement since Friday night, he said.

Mr. Premasiri explained that air quality levels are dependent on wind patterns, and from November to February/March, the period of the northeast monsoons, there is a tendency for air quality to deteriorate.

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Picture credit: Sunday Times