Why are rain forests important?

With the development of the society, most of people cut the trees to build the buildings. The natural resources destroyed very seriously. In the rain forest, there are lots of different kinds of wild animals, and some of them are scarce. It provide a habit for animals and plants to live. Next, it can help to change the weather, rain forests store water like a huge sponge. In fact, it is believed that the Amazonian forests alone store over half of the Earth's rainwater. Moreover, the nutrition of land is very poor, because of the huge trees. So it caused a huge problem, most of country want to sell trees to others and they cut tress. Because of the poor land, so most of new trees will not get nutrition to grow. Finally, most of areas become desert.