Trees can beautify our environment and absorb carbon dioxide.Trees are very important to our lifes, they help us in many ways. For example, trees provide oxygen to us and absorb carbon dioxide, purify the air and makes the environment a pollution free place to live. Trees have roots which hold the soil and prevent soil erosion. In coastal areas they also prevent flood. Trees also provide us with various kinds of timber (wood), and give us food items such as fruits. When it is hot we rest under a tree because it provides shade to us and protects us from the harmful UV rays of the sun.希望采納。