Saving the Earth becomes one of the biggest problems in the world. We can find the rubbish in many places. It not only makes our environment (环境) very bad but also harms people’s health. So we should not t【小题1】 rubbish onto the ground. Some factories pour waste water into rivers, lakes, the sea and the l【小题2】 . It can p【小题3】 the earth, sometimes it can k【小题4】 lots of fish. We must keep our environment clear and tidy. We have only one Barth. It is our home. We must try our best to p【小题5】 it, and make our home more beautiful.