Dhaka, June 7 -- Dhaka has ranked second on the list of cities worldwide with the worst air quality, with an AQI index of 178 at 10:15am today.

Dhaka's air was classified as "unhealthy", according to the air quality index.

Kinshasa of the Democratic Republic of the Congo, Jakarta of Indonesia and Santiago of Chile occupied the first, third and fourth spots on the list, with AQI scores of 181, 156 and 155, respectively.

No alternative to extensive afforestation to protect environment, combat climate change

When the AQI value for particle pollution is between 101 and 150, air quality is considered "unhealthy for sensitive groups", between 150 and 200 is "unhealthy", between 201 and 300 "very unhealthy", while a reading of 301+ is consid...