Nowadays, the environment has been polluted seriously. Take my hometown for example, when I was very small, I could swim in the river and catch fish, but now, the water is very dirty and there are full of trash. The government has made many action to return the green and it is everybody"s duty to bring the world some green. March 12th is the tree planting day and students are called to plant trees. I take part in this activity all the time and the trees I grew last year have grown much taller. I am so proud of making the world green. Without it, we could not live for long.