-1
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.
-2
As time goes by, man is making the earth sick. People cut down too many trees and leave rubbish everywhere. Factories let out their waste without doing anying to it . This has cause some serious probls. Such as the land is sandy, the river is dirty, the air is less clean, even the tperature of the earth is rising. What should we do to save the earth ? My suggestion is that we should plant more trees, put rubbish into dusbins and stop factories pouring waste directly into the air or rivers. In all, we have only one earth, we should do our best to protect it, or we will regret.
-3
The population of the earth is increasing very fast. Humans must make the earth support the increasing population.This has made it necessary for agriculture and industry to develop rapidly. Such a rapid development produces more and more waste, which goes into the water, the soil and the air.Some of it is made harmless. However, where there is too much of it, the poisonous waste may do great harm to the things around the people.
When farmers add fertilizer to the soil to make plants grow better, or use poison to kill pests, poison is sent into the air, the water and the soil. When birds, fish and people eat the grain, drink the water or breath the air, harm will be done to their health.
The air in big cities is often made very dirty by cars and factories. Millions of tons of waste and poisonous gases are sent into the air with the smoke. In some places, little is done to make the smoke clean before it goes into the air.
Fortunately, people are beginning to realize just how serious the whole situation is. In many countries, laws have been made to stop factories from sending out poisonous gases.
