Saving the Earth How to protect the environment becomes one of the biggest problems in the world. We can find the rubbish not only pollutes our environment but also harms people’s health. So we should not throw rubbish onto the ground. Some factories are pouring waste water into rivers, the lakes and the fields. It can pollute plants, sometimes it can kill lots of fish.We must keep our environment clean and tidy. We have only one earth. We must try our best to protect her, and make our home more beautiful