BANDAR SERI BEGAWAN, Sept. 24 (Xinhua) -- Brunei has the second least polluted urban areas in the world, according to study by the World Health Organization (WHO) measuring ambient air pollution in 1,622 locations across 92 countries.

Australia has the least polluted urban areas, followed by Brunei and New Zealand. Estonia is Europe's top performing nation, followed by Finland and Iceland, said local daily the Borneo Bulletin on Monday, quoting the WHO study.

Pollution-related deaths in Brunei are also among the lowest among countries included in a Lancet Commission report on pollution and health published in The Lancet medical journal recently, with the sultanate standing alongside Sweden.

The five countries topping the Lancet rankings are Brunei, Sweden, Finland, Barbados and New Zealand.