With the development of our society， energy in the world bees more and more limited， so it is quite important for us to save energy and to protect our environment。 As a student， there are a lot of methods we can do to save energy at home。 For example， first， we can turn off the light as well as other appliances when we are not using them。 Second， recycle the waste water， paper and other waste so that we can reuse them。 What's more， it is suggested to use public transportation more instead of private cars。

　　 Above all， everyone can make a great contribution to our environment。 I hope I can learn more to develop new and clear energy， like energy from the wind and solar。