My lifestyle has changed a lot recently. For example, on such a hot day, I try me best to keep myself away from turning on the air conditioner. Instead, I open the windows and turn on the fan. I no longer asked my father drive me to school with his big and comfortable car. Instead, I adapt myself to going to school by bus which is usually crowded with people. The reason why I make these changes that are different from what I used to do is that it is time for us to do our best to protect our Earth.

     After watching the documentary film, ±2℃, which is talking about those influences such as global warming. I started to notice that how seriously humans have damaged our Earth and we, human beings are facing a crisis we have never met.

     In the film, a little girl younger than me standing on the stage asked all the participants who took part in the international meeting a question. "What is to be done?" This direct question waked most of us up from doing so many stupid things that are pushing ourselves to death. For instance, the great emission of carbon dioxide from cars, industries and so on has made the weather hotter and hotter. One day, if the temperature is so high that humans couldn't endure, all of us will die in very short time just like dinosaurs. Therefore, we should take action to protect our Earth as soon as possible.

     There are some ways that we can do to protect our Earth. First, in order to stop or decrease the effect of global warming, we should cut down on the emission of carbon dioxide. I go to the place that is far away from home by bus and go to the place that is near my home on foot or by bike. No longer do I ask my parents to take me by car. Second, it is said that those made from plastic couldn't be dissolved by germs and will live on the Earth for more than ten thousand years. The only way to make them dissolved is to burn them. But if we do so, our air will be polluted. As a result, we should stop or reduce the use of them. Third, we should tell those we know the danger we are facing and let them know that it is time for us to change our lifestyle so as to keep the threat away. If everyone on the Earth starts to help protect her, even a small action like turning off air conditioners, lights, etc can have great effect.

     To sum up, our Earth has been damaged for such a long time by humans. If we don't make any change, all the creatures will lose their lives. For this reason, the most important thing in this century is to find a new way to live and save our Earth.