Forests and natural environments are being destroyed in Japan and around the world. In Japan, for example, trees are cut down and hills are leveled to make roads or leisure areas. In other places in the world, tropical forests are being destroyed one after another, as more and more timber is cut from them. It’s said that in the last 50 years, half of all tropical forests have disappeared.

What will happen to the Earth if forests continue to be destroyed? Without plants to absorb carbon dioxide, the amount of carbon dioxide in the air will continue to increase. People and animals will not be able to breathe clean air. So you can see this is a big problem.