The earth we live on is an enclosed environment . Human beings can be born and live on it until they die. The earth's surface is covered with about thirty percent of land and seventy percent of water. It is surrounded by air. So we can say the earth we live on is the best example of a biosphere itself.
The earth has water and air as nutrients for the plants and humans as well as for animals. Nothing important enters the earth's environment except the sun's light and heat. Furthermore nothing leaves as waste except some heat. The earth always has a perfect balance among plants, humans, animals and chemical elements., that is among everything in the environment. But now, this perfect balance is in danger of being destroyed by humans. People are destroying Tropical forests as they are creating more carbon dioxide by burning fuel, and as they are polluting the oceans and the air. Moreover, the increasing population of the world is also using up the earth’s natural resources fast.
We are worried about such human actions will one day destroy the balance among everything in the earth's environment. Learning how to protect our own environment is the most important thing we can do, both for ourselves and for our children. We need to do everything we can to save our own environment before it is too late. For it, biosphere is the most suitable project. Everyone hopes they will be successful. Now, the earth we live on is full of inventions and discoveries not only for its existence but also for its safety.