There is no denying that trees not only play a magnificent role in keeping ecology in balance, but also provide people with various resources.
To begin with, trees produce oxygen and absorb carbon dioxide, which offer us fresh air. As greenhouse effect is getting more and more serious, planting more trees is an effective way to respond to it.
Apart from this, it is tree that stabilizes soils and prevents them from being eroded by floods. Besides, trees can be applied to against desert. Moreover, trees perform the function of the regulation of air temperature and humidity. This benefit to peoples fitting to the environment.
Last but not least, trees are a kind of material of paper making, which makes our life and communication between people more convenient.
From what has been mentioned above, we can get the conclusion that trees improve both our environment and life, it is necessary for us to plant more trees.