写作 阅读下面的短文，然后按照要求写一篇150词左右的英语短文。 The U. N. Climate Change conference opened in Copenhagen, Denmark on Dec.7th with some 15,000 delegates and observers from nearly 200 countries attending what is called the last best chance for an agreement to combat global warming. Most scientists believe the warming trend is mainly caused by human activity, especially the use of fossil fuels (化石燃料) and the cutting down of forests. In Copenhagen, experts and officials alike are putting the emphasis on what people and governments can do to cut the emission (排放) of greenhouse gasses. Scientists say a 25 to 40 percent cut in carbondioxide emissions is needed to control global warming. A youthful online group that calls itself the 'LowCarbon Tribe'  is leading the way to an ecofriendly lifestyle. Tribe members, who range in age from 20 to 40, say they are trying to reduce carbon dioxide emissions in a relaxed and fashionable way. Helping save the planet is part of their daily routine, they claim, citing the way they dress, what they eat and how they travel. 【写作内容】  1．以约30个词概括这段短文的内容； 2．然后以约120个词就“低碳生活”进行议论， 内容包括： (1)低碳生活所包含的出行方式，节能等方面，并具体举例说明； (2)简要谈低碳生活的好处。 【写作要求】 1．在作文中可以使用自己亲身的经历或虚构的故事，也可以参照阅读材料的内容但不得直接引用原文中的句子； 2．作文中不能出现真实姓名和学校名称。 【评分标准】概括准确，语言规范，内容合适，篇章连贯。