Because humans have been added to quickly calculate continuously. Increasingly, therefore, needs to take to build a House, furniture, and is not a substitute to make planting forests dropped rapidly.
Since humans The number will rapidly increase steadily. The demand is growing. Its objective is to build houses, furniture and various. And replanting Forestry makes a rapid decline.
Due to human. There is increasing rapidly to number continuously. Demand is increasing, and the house, furniture and supplies, and growing, forest decreased rapidly.