In recent years, the environmental problem has been a concem of the people . Now , the global warming is becoming more and more serious. The earth is green space is less and less. So i advocate a variety of trees ,green travel. We should treasure the food, because children in poor areas do not have enough food to supply . We should do more work to help children in poor areas to read, eat a warm meal. So we should protect the earth , so that the earth is life is more and more long. Let the world become more beautiful !