In last 15 years, smog in Sumatera have expanded to wider areas and have reached neighbor countries, Singapore and Malaysia. The smog itself is not a natural disaster since the local governments reported that many of fire spots were commonly triggered as the impact of land clearing by local people when they are opening lands for farming or companies that have forestry concession are opening new plantations by burning their area concession which this way is the cheapest and easiest way to open the new areas. Bigger wildfires are usually occurred when land clearing touch areas that contains peat area and when it is happened in the dry season like past two months which many smog cases reported, it is just like a candle light being thrown into big gasoline tank.