Slight haze on Tuesday morning as three

The Straits TimesSlight haze on Tuesday morning as three-hour PSI reading rises to 87The Straits TimesSINGAPORE - There was a grey cast to Singapore skies on Tuesday as slight hazy conditions persisted through the day. The three-hour Pollutant Standards Index (PSI) reading hit 91 at 10am, according to the National Environment Agency's (NEA) website.and more »