减少水土流失英语

Forests are very important to humans .They give us shade .They provide home for birds and animals .They heip to make the air clean . .Nowadays many forests have been cut down by humans. As a result ,the water and the earth run away , the floods and droughts may often happan.It brings us lots of harm .So we should plant trees to protect our environment.Everyone shuold make a contribution to protecting our environment.

the trees to prevent soil erosion

How to protect forests简单的our country has a large area of forest. however,not until recently did the goverment begin to realize the importance of protecting the forest. as we may know from various sources,the government recently adopted a policy called "restore the farmland to the forest"(退耕还林）。this has brought much hope to the forest of our country as well as the sustainable development of our country.还有一个难的：Save the Forests These days we often talk about the importance of our natural resources. In many countries they are disappearing at a rapid rate and environmentalists are urging people everywhere to protect their air, water, forests, wildlife, and so on. It is difficult to choose just one natural resource to save, but in my opinion, saving the forests should be the top priority.examda.com First of all, forests help to preserve other natural resources such as water, air, and animals. Without forests, the land cannot hold water as well. This means that in a heavy rain hillsides will collapse, causing great damage. Not only that, but without the protection of trees, the nutrient-rich topsoil will be washed away and nothing will be able to grow on the land. Trees also help to clean the air by absorbing carbon dioxide and producing oxygen. And, of course, forests are the natural habitat of many wild animals. Without them, these animals will not be able to survive. Another reason to preserve our forests is that large numbers of trees can help to mitigate the greenhouse effect by absorbing solar radiation. And finally, forests are a place where people can get close to nature, and if they learn to love nature, they will want to preserve all the earth’s natural resources. All of the earth’s natural resources are important, and we should all work to save them. The reason that I choose the forests as most important is because they help us in so many ways. By saving the forests, I believe we can save the planet.

Trees can stop the soil from being washed away.

标准但：Trees can stop the soil from being washed away.wash away 是冲走的意思，这句话里应该用被动语态，所以是being washed away. stop sb from doing sth 是个固定短语。