Air quality in Singapore hits unhealthy range on Sunday

Channel News AsiaAir quality in Singapore hits unhealthy range on SundayThe Straits TimesSINGAPORE - Air quality crept into the unhealthy range from as early as 3am on Sunday morning, with the 24-hour Pollutant Standards Index (PSI) registering readings of between 92 and 100 across Singapore. The 24-hour PSI, a measure of air quality here, ...Hazy conditions in Singapore to persist in coming daysChannel News AsiaAir quality to get unhealthy as haze lingersTODAYonlineHaze making Sunday afternoon unhealthyAsiaOneall 21 news articles »