Reuters: Singapore's air pollution level rose to "very unhealthy" levels late on Wednesday, with the main pollution index hitting the highest on record, as smoke from Indonesian forest fires enveloped the city-state. The Pollution Standards Index (PSI) soared to 290 at 9:00 p.m. local time (1300 GMT), up from 190 just an hour earlier. A PSI reading above 300 indicates "hazardous" air quality and 201-300 means "very unhealthy". The 290 level is also above the previous 226 record reached in Singapore in 1997...