sentences:  In 2009, around 40% of all fires in Peninsular Malaysia, Borneo, Sumatra and Java were detected in peatlands, even though they cover only 10% of the land area studied.The concentration of sulphur in rain falling over Singapore in 1997 correlated closely with the PM2.5 concentration, which can be attributed to the strong sulphur emission from peat fires.Haze related damages can be attributed to two sources