With the rapid development of the economy, pollution has become one of the most serious problems nowadays. The emission of greenhouse gases not only results in more and more CO2 in the atmosphere but also keeps the temperature going up. It has many harmful effects on human beings and nature, such as the rise of sea levels, many natural disasters and so on.
Therefore, it’s time to take steps to make a difference. First of all, we should save energy .We should turn off the lights, the TV ,the computer and so on if we are not using them any longer. We can walk or ride a bike when we go out instead of using motor vehicles. Secondly, we should plant more trees as they absorb carbon dioxide from the air and refresh our spirit when we look at them. Finally and most importantly, we should talk with our family and friends about global warming to raise people’s awareness of the importance of protecting the environment.
试题分析：本文属于提纲来短文，同时也是议论文。使用第三人称为主与一般现在时。要点为：1.全球气候变暖是目前人类面临的最大的环境问题之一。2.温室气体的排放导致大气层中二氧化碳的含量越来越高，温度升高。3.海平面急剧上升，自然灾害频繁等。4.措施：节约能源；绿化环境；提高公众意识。写好提纲式作文的关键是认真审题和分析所给的提纲，因此考生首先要认真阅读前面的提示，认清写作要求和提纲之间的关系，然后确定文章的主题、文体、人称和时态。根据所给提纲，列出要点，并以此为基础充分发挥自己的想象力，灵活运用英语知识，采用不同的表达方式将各要点完整地表述出来，注意主次分明，详略得当。
【亮点分析】本文的亮点在于连接词的使用，如：first of all, secondly, finally and most importantly；另外一些高级词汇运用也很多，如atmosphere；take steps；make a difference；raise people’s awareness of；absorb carbon dioxide。
