Water is once stored, and it forms river later and goes down to the ocean. This function provides us drinking water to live. In woods, microbes decompose fallen leaves and carcass to create soil. A floating of river will transfer the soil, and they will create enriched lands. As stated above, woods have various functions to support our lives.
Forests are very important.
However, they have been rapidly cut. According to the United Nations' report in 1990, forests as wide as a half of Japan was destroyed annually. The tropical forests in Amazon and Southeast Asia are treasure houses of the livings. The tropical forests are also abundant in nutrition. However, the rapid deforestation of the tropical forests has accelerated, and dynamites and chain saws destroyed trees.