Please save the earth is a slogan that we can almost here every day now.Owing to the pollution and human activities,the environment of our world has been changed dramatically.The deforestation of the rain forest in south america,the rising of the horizon and the booming temperature,all of them are reminding us that it is time to act or it might be too late.From my point of view,it is essential for us to start now and start from every little detials in our lives,we just need to do some very simple things such as turn off light when we left classroom and recycling,we will be able to make a differene and actually contribute to the environment protection.