全球气候变暖是目前人类面临的最大环境问题。请你根据以下提示，写一篇英语短文,为“节能减排”献计献策。
背景: 随着经济的发展，更多的温室气体被排放，其中大约70%为二氧化碳，这也是全球变暖的主要原因之一。
后果：海平面上升；自然灾害频繁。
措施: 1.多使用清洁能源，少用煤、油；
2.在可能的情况下以步代车；
3……
要求: 短文必须包括以上提到的的所有内容要点，可适当发挥。 2. 词数:100左右。
With the development of economy, more and more greenhouse gases are being discharged into the air. CO2 makes up about 70％of the greenhouse gases, which is considered to be one of the greatest causes of global warming. It has harmful effects, causing the sea level to rise and many natural disasters to strike.
So we must take effective measures to save our planet. First, we should use more clean energy and less coal and oil. Second, we should go to work on foot or by bus instead of driving a car if possible. Third, we should plant more trees to beautify and purify the environment, because plants can turn CO2 into oxygen. More importantly, we should form the habit of saving energy in our daily lire.
【解析】
试题分析：这是一篇提纲类作文，我们需要用正确的英语把给出的要点表达出来.本作文中给出的要点比较具体,故需要准确表达.写作时注意准确运用时态，上下文意思连贯，符合逻辑关系，尽量使用自己熟悉的单词句式，同时也要注意使用高级词汇和高级句型使文章显得更有档次。特别注意在选择句式时要赋予变化。
【亮点说明】本篇书面表达使用了两段式结构，开门见山地点明了现在随着经济增长环境问题越来越严峻；第二段提出了保护环境的一些有效措施，层层递进；本文的亮点是运用了恰当的关联词，如First，second，third，使得文章条理清晰，语句通畅；句式with the development of. 和定语从句等结构的运用也为文章增添了亮色。
考点：考查提纲作文
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B. To describe a possible future scene where robots take control of our life.
C. To warn readers of the possible dangers of robotic nurses and doctors.
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2.Why does the author prefer being served by humans rather than by robots?
A. Robots are indifferent and emotionless.
B. Robots can't provide efficient services.
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D. It is not known whether diseases have something to do with lack of water
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