Since I went to school, the school will organize an activity for students on March 12th every year, because it is the Tree Planting Day. We are educated the importance of the green, and planting trees can bring the world a beautiful environment. I join the activity all the time, which makes me feel proud because I make a contribution to bringing the world green. Since I was very small, the environment in my hometown was beautiful, but the pollution got serious soon and now the river is smaller and there is full of trash. Seeing the change of my hometown, I am so desire to make some contribution to protecting the environment. The return of green is an emergent task. If the environment keeps being polluted, then we won't live the healthy life.