A general view shows part of the city shrouded by haze, in Singapore, on June 20, 2013. Singapore's air pollutant index was again hovering around the "hazardous" level of 301 at midday, close to the all-time high of 321 set the night before. Any reading above 200 is considered threatening to health
A general view shows part of the city shrouded by haze, in Singapore, on June 20, 2013. Singapore's air pollutant index was again hovering around the "hazardous" level of 301 at midday, close to the all-time high of 321 set the night before. Any reading above 200 is considered threatening to health