In recent years, the level of social industry has developed extremely rapidly, and at the same time, the various wastes generated have caused great damage to the environment.
In recent years, the level of social industry has developed very rapidly, and at the same time the resulting waste has caused great damage to the environment.
In recent years, the level of social industry has developed rapidly. At the same time, all kinds of wastes produced by it have caused great damage to the environment<br>