張國梁

Air is all around us. We cant live without air. Its the most important thing for living things in the world.

Its around us all the time. We can live without food or drinks for a few days. But we cant live without air for more than a few minutes. Now do you think the air is the most important thing in the world？ If there is no air， there is also no life.

We cant see or feel the air. But its really very important. But now the air we breathe gets dirtier and dirtier. The main reason is the air pollution. With more and more factories， cars and buses everywhere， the air gets much dirtier than before. We should keep the air clean. If we breathe dirty air， well get sick.

So we must find some ways to keep the air clean. Everyone should do his best to stop the air pollution. If everyone knows this， the air will get cleaner and cleaner， and the world will get more and more beautiful.