Sri Lanka, Nov. 11 -- Air quality in several cities in Sri Lanka has deteriorated to unhealthy levels owing to various factors, the Central Environmental Authority (CEA) has stated.

According to Dr. Ajith Gunawardena, the Director of Environmental Education and Awareness of the Central Environmental Authority, the air quality index in the Northern and North-Eastern regions has risen to around 150 units, reaching a somewhat unhealthy level.

The Director attributed the deterioration of air quality to transboundary air movement and air pollutants entering the country from the north along with atmospheric disturbances that occurred about two weeks ago.

Dr. Gunawardena stated that the air quality index has risen to between 150 and 200 in Ja...