答案：[高分范文]
My low-carbon life
The environmental pollution is worse and worse today. We are facing many environmental problems now. For example，too much use of plastic bags has caused serious white pollution. Wastewater flowing into the river not only pollutes the environment but also does harm to people's health. As students，we should do our part to live a lower-carbon life.
First of all，we can walk or ride a bike instead of driving. Second，we are expected to turn off the taps and lights when we don't use them. Third，remember to go shopping with a reusable bag rather than plastic bags.
Let's take action from now on.
[名师点评]
短文介绍了目前的环境问题及如何做到“低碳生活”，增强了读者的环保意识。
① 短文开篇介绍环境现状以及原因和危害；
② 短文使用了 first of all、second、third 等顺序词，增强了短文的层次感，逻辑性强；
③ when 引导的状语从句的使用彰显作者扎实的写作功底；
④ 短文运用了一些如“not only ... but also ...”、do harm to 和 rather than 等高级短语，是短文的加分项。

答案：One possible version:
What can we do for the environment?
Our environment is becoming worse. What can we do for the environment?
First, we can save water by taking shorter showers and turning off the taps when brushing our teeth. Second, we should never forget to turn off the lights when we leave the rooms. We should also turn off the power if our TV or computer is not in use. Third, we can take our own bags instead of using plastic bags when we do the shopping. Moreover, it will be better if we walk or ride to school.
In my opinion, even the simplest daily activities can make a difference to the environment. If we do something for the environment, we can make the world a better place to live.