The main reason is logging. Most of them are logging for business. For example, there are building houses, and illegal logging for sale. People who smuggle wood because they need wood to benefit themselves. Without planting by themselves. And they need money from the sale of wood. From these actions may cause flooding because there are no tree roots absorb water, and landslides due to soil erosion. Because there are no trees to hold the topsoil, it is like a weir to help slowdown of water before coming down into the community area. The trees are decreased. It makes the wood expensive. Then, people turned to smuggle wood because they do not pay to buy the logging of business for any purpose(Allen, 2017). It is a factor that causes a decline in the number of forests and creates a lot of intelligence.