Fires that occur on peat lands can smolder a long time resulting in unhealthy hazy conditions and high sulfur emissions.
After peat swamp forests have been cleared and drained the peat soil is still unsuitable for planting because it is poor in nutrients and too acidic.
Fertilizer and chemicals need to be added to the soil but because the cost involved can be high the plant material left over from logging is set on fire.
The ashes fertilize the soil and neutralize the acidity in the soil. The land is then used for the production of oil palm and pulpwood.
The haze can affect peoples health by irritating the nose, airways, eyes and skin. Naturally people who already suffer from asthma, lung disease and skin allergies can be severely affected by the haze. The elderly and children are also more likely to be affected.