50分 急求一份关于 气候变化 的英语演讲稿，谢谢
Thank you very much. Good morning. I want to thank the Secretary General for organizing this summit, and all the leaders who are participating. That so many of us are here today is a recognition that the threat from climate change is serious, it is urgent, and it is growing. Our generation's response to this challenge will be judged by history, for if we fail to meet it -- boldly, swiftly, and together -- we risk consigning future generations to an irreversible catastrophe. No nation, however large or small, wealthy or poor, can escape the impact of climate change. Rising sea levels threaten every coastline. More powerful storms and floods threaten every continent. More frequent droughts and crop failures breed hunger and conflict in places where hunger and conflict already thrive. On shrinking islands, families are already being forced to flee their homes as climate refugees. The security and stability of each nation and all peoples -- our prosperity, our health, and our safety -- are in jeopardy. And the time we have to reverse this tide is running out. And yet, we can reverse it. John F. Kennedy once observed that Our problems are man-made, therefore they may be solved by man. It is true that for too many years, mankind has been slow to respond or even recognize the magnitude of the climate threat. It is true of my own country, as well. We recognize that. But this is a new day. It is a new era. And I am proud to say that the United States has done more to promote clean energy and reduce carbon pollution in the last eight months than at any other time in our history. We are making our government's largest ever investment in renewable energy -- an investment aimed at doubling the generating capacity from wind and other renewable resources in three years. Across America, entrepreneurs are constructing wind turbines and solar panels and batteries for hybrid cars with the help of loan guarantees and tax credits -- projects that are creating new jobs and new industries. We're investing billions to cut energy waste in our homes, our buildings, and appliances -- helping American families save money on energy bills in the process. We've proposed the very first national policy aimed at both increasing fuel economy and reducing greenhouse gas pollution for all new cars and trucks -- a standard that will also save consumers money and our nation oil. We're moving forward with our nation's first offshore wind energy projects. We're investing billions to capture carbon pollution so that we can clean up our coal plants. And just this week, we announced that for the first time ever, we'll begin tracking how much greenhouse gas pollution is being emitted throughout the country. Later this week, I will work with my colleagues at the G20 to phase out fossil fuel subsidies so that we can better address our climate challenge. And already, we know that the recent drop in overall U.S. emissions is due in part to steps that promote greater efficiency and greater use of renewable energy.
2011 模拟联合国，求俄罗斯的开场演讲和立场文件。
主题是气候变化。
英文最好~
估计你是哪个大学的吧，嘿嘿我好想知道噢
Hello, everyoneToday, I am honored, on behalf of the great Russian speaking.2010 summer heatwave and drought caused serious damage to the Russian forest fires. Climate change will make Russia grain reduction in production of about 1 \\\/ 4.Russia's vast territory, continental climate characteristic is obvious, especially vulnerable to climate change caused by the impact of extreme weather. When a flood occurs, as the coastal city of St Petersburg, the consequences will be unbearable to contemplate. River runoff change, storm, melting glaciers and many other risk will bring Russia trouble.President Medvedev had announced that Russia can accept targets for carbon emissions in 1990 based on the reduction of 15% to 20%, and then the target up to 20% to 25%. Although, to some extent affect Russia's economic development. But for the benefit of all mankind, we are willing to do so.Medvedev has also stressed the importance of improving energy efficiency. We plan to in the next 10 to 15 years to complete transformation of Russian competitive basic sectors of the economy, and reduce the petroleum, natural gas and mineral dependence. Many people think that these goals unrealistic. They may want to add: to increase investment in clean energy technologies will only make Russia economy is more dependent on the resource, but I firmly believe that the results will be exactly the opposite. This is not only because of climate change will eventually hurt the economy. Take effective measures to reduce carbon emissions, and with the international community to work together, can promote the economic development in russia. Can say even, climate change can be used as a Russian leaders seek economic modernization is an important means of.If a state investment in low carbon technology and lifestyle changes on slow action, the competition will only gradually to his country. Petroleum and natural gas of Russia's GDP play a decisive role, but they have is industry of the setting sun, at least for the time being. Russia will strive to become a technology leader, to the industry upgrading and transformation, one of which is widely used in natural gas and coal-fired power plant carbon capture and storage technology. Like Germany, China, Korea these investment in low-carbon technology earlier country and Middle East several major oil and gas producer, has invested heavily in these areas. If we do not act quickly, will only fall further more.Yes, the industry transition cost greatly. But in needs huge capital investment industry, Russia should be sought from other countries and international organizations with the help of. Russia should make full use of sign Kyoto Protocol after obtaining permits, as more environmentally friendly policies to raise funds.Finally, I wish all of you, to represent their countries you, we hand in hand, and common facing and solving our common problems!Thank you, my speech.
!!!全球变暖 100字英语演讲稿
这么重量级的题材，150字太少了
下面是205字，如果觉得太长，最后一段40字可以去掉。
topic of global warming is attracting attentions of countries all over world. This global warming is on such a scale that it will wreak havoc on both poor and rich countries. It could even make large sections of the earth uninhabitable. What have caused global warming? The theory and evidence strongly suggest that human-related emissions of carbon into the atmosphere is causing, and will in the future cause, significant global warming.How we should fight global warming? We should be taking active steps now to curb emissions and we should be engaging in international co-operation to do so. A simple natural way to fight global warming is to have escalating Taxes on carbon emissions. There is a simple reason why this is the ideal remedy: carbon emissions into the atmosphere constitute a nuisance to everybody on the planet; so those who make this nuisance should pay for their actions. A further recommendation is that there should be large-scale government support for research into new technology that will reduce carbon emissions. China is the rising economic star; and if it also wants to assert world leadership status, it is a good opportunity for China to show the world that it has a moral commitment and the will to fight global warming.
求大学生英语演讲稿，主题是：资源节约与环境保护
范文毕竟是别人的，要学会利用其中的好句子，句型，不要照抄，底下是我找的一些，你来晚了一小步，我刚考完中考，电脑里储存的英语学习资料都詧除掉了，中考其实作文并不太难（安徽的），单词一定要背完背熟。
还有能不呢不过提个意见，“15分呐”...说那么夸张，口气像是150分:-)英语中考作文焦点——以环保话题 今年几个世界大国首脑都参加了“八国峰会”，这次的主题是世界经济、能源问题和气候变化。
经济发展离不开环境话题，能源使用必然污染环境，而气候变化就是经济发展和环境问题矛盾的产物。
广西的城乡清洁工程表面就是环境整治问题。
学校的两基工作从某种意义上来说其实就是学校环境改变没有。
2008年北京奥运会也离不开环保这个主题。
八荣八耻也有部分内容是关于环保主题的。
总之，环境保护是当今世界难题。
因此，中考的内容离不开以下这些范文要点，而且都是记叙文形式，有些句子相当有用，不论什么作文，都可以从下列文章选出相应句子，只需稍微改一下地名或主语，尽量减少语法错误，起码有4、5分是正确的。
如：Throw the waste here and there(到处乱扔垃圾)变成Don~t throw the waste here and there.(不准乱扔垃圾)。
“应该”变成“不应该”等等。
我想中考作文完全可以取得高分。
比如：作文题：1、职业：将来想干什
或者你的爱好是什么
（或者题目是：毕业之后）你可以写将来做一个环保注意者，如何做
做什么。
2、如果题目是写我的班级、学校、家乡之类的更加可以谈到环保情况（讲现象，有好有坏，如何去改变
有什么措施
如何的美
）3、如果是写为什么北京有沙尘暴、为什么今年有些省份干旱少雨
为什么有些省份洪涝灾害严重。
那就是环境破坏问题。
因此关键最后几天最好能背熟这些范文。
尽量围绕环保展开主题，通过过渡句和环保扯上联系。
比如：(过渡句)The most important question in the world today is pollution .（当今世界最重要的话题就是污染问题。
） 范文提示 1) It’s our duty to save water（节约水是我们每个人的责任。
） As we know , water is very important to man, （我们知道，水对人类来说是非常的重要。
）we can’t live without water. （没有水我们就不能生存。
）The amount of water which is suitable to drink is less and less. （适合人类喝的水是越来越少了。
）But some people don’t care about it .（但是有些人却不关心或不在意。
）They waste a lot of water in their daily life. （日常生活中他们浪费很多水。
）Even worse, they pour dirty water in to rivers.（更糟糕的是他们排放污水到河流里。
） They throw rubbish into rivers , too. （他们还乱扔垃圾到河流理去。
）Many rivers and lakes are seriously polluted.（很多河流湖泊已经受到严重污染。
） Something must be done to stop the pollution. （人类必须采取一些措施来制止污染。
）Only in this way can we live happily.（只有这样，我们才过得幸福开心。
） If we don’t save water, the last drop of water will be a tear-drop of us.( 如果我们不节约水，那么最后一滴水也许会是我们人类的眼泪) 2) Planting trees Trees are very helpful and important for us. （树对我们人类是多么的重要和有用。
）We should plant more and more trees in order to live better and more healthy in the future. （为了将来我们的生活过得更好、更加健康我们应该种更多的树。
）It’s everyone’s duty to love and protect the environment.（爱护和保护环境是每个人的责任和义务。
） 3) 旅游介绍 预览摘要： 北京奥运会期间，有一大批外国人来北京参观。
假设你是导游，请根据以下内容，向外宾简单介绍北京的情况。
要求： 1. 100 词左右； 2. 要点包括： a. 有悠久的历史b. 有许多名胜古迹 Ladies and gentlemen，（女士们、先生们） Welcome to BeiJing， now let me introduce Beijng to you.（欢迎到北京，我来介绍北京给大家。
） Beijing is a city with a long history. It is in the north of China. It has a population of 13,240,000.（北京是一个历史悠久的城市，它位于中国的北部，人口13.240.000） There are many places of interest in Beijing, such as the Summer Palace and so on.（北京有很多名胜古迹，象颐和园等等。
） The Great Wall is a beautiful place.（ 长城是个漂亮的地方。
）.There is a saying that he who has never been to the Great Wall is not a true man. （有句谚语说：不到长城非好汉）The water in Miyun Reservoir is clean and not polluted. （密云水库的水很干净没有受污染。
）There are all kinds of fish in it. （里边有各种各样的鱼。
）You can go boating, go fishing and have a picnic there.（那里你可以划船、钓鱼或者野炊。
） It is really a good place to spend your holiday. （那里真是个度假的好地方。
）Besides, you can go and visit Beijing Museum. （此外，你还可以去游览北京博物馆。
）There you can see a lot of dinosaur egg fossils.（那里你可以看到很多恐龙蛋和化石。
） I hope you can enjoy yourselves in Beijing.（我希望大家在北京玩得开心快乐。
） Thank you.（谢谢） 4）、近日，你班在“知荣明耻” “八荣八耻大家谈”教育活动中，召开了一次关于学生荣辱观的主题班会。
存在的问题1．不尊敬老师、家长等。
2．学习散漫、考试作弊等。
3．乱扔垃圾、污损环境等等。
Recently we have held a class meeting to discuss what is considered to be honorable behavior and what is shameful. （最近我们班开了个班会讨论什么是光荣和耻辱。
）It is really a pity to see all this in our school.（很遗憾在学校看到这些现象）Some students don’t respect their teachers or parents. （不尊敬老是和父母）Some don’t take their studies seriously and cheat in exams. （作业不认真，考试作弊）Some throw wastes everywhere and pollute the environment . （到处乱扔垃圾污染环境。
）It is honorable to obey the law and rules , care much about our class and study hard.（关心班级、努力学习、遵纪守法是光荣）It is shameful to break school rules, to be selfish or to make little effort to achieve success.（违反学校纪律、自私 骄傲是可耻的）We should respect others and think more of them than of ourselves.（我们应该尊敬别人经常关心别人）We should work hard and make much more progress to repay the society.（我们应该努力学习取得更大进步从而回报社会。
）We should try our best to keep the environment clean。
（我们应该想方设法保持干净的环境。
） 人与环境是和谐相处的，我们生存在地球上，人是自然之子，而不能仅把人看作自然的征服者，大家都知道，人类只有一个地球，地球上的山山水水、动物。
植物是人类的细胞，如果我们把它损坏了，破坏了大自然的组织，等 于消灭人类。
因此，环境要与社会公德联系起来，与实践行为作为人格教育的一项重要内容来抓。
每个人都要履行保护环境的责任和义务。
Harmony with the environment is that we live in on Earth, who is a natural son, and not only to natural persons as the conqueror, as we all know, there is only one earth and the mountains on Earth, the animals. Plant human cells, if it damaged, destroyed nature organizations, to the eradication of mankind. Therefore, the environment must be linked with social ethics, character education and practice acts as an important element of it. Everyone must fulfil its responsibilities and obligations to protect the environment. 保护我们的城市(Saving Our City) It is very important to deal with the rubbish in cities. Rubbish must be thrown away or reused properly. Or it may cause a lot of problems. It may pollute the air and water. People may get ill when they breathe the polluted air or drink the polluted water. Our city has started to face the problem. Some rubbish is sorted and sent to a certain place .Waste gas is cleaned before it goes into the air. Waste water is also cleaned before it is poured into rivers. People should be prevented from throwing rubbish everywhere. We should try our best to take care of our environment and fight against pollution. 保卫地球(Saving the Earth) As time goes by, man is making the earth sick. People cut down too many trees and leave rubbish everywhere. Factories let out their waste without doing anying to it . This has cause some serious problems. Such as the land is sandy, the river is dirty, the air is less clean, even the temperature of the earth is rising. What should we do to save the earth My suggestion is that we should plant more trees, put rubbish into dusbins and stop factories pouring waste directly into the air or rivers. In all, we have only one earth, we should do our best to protect it, or we will regret. 如何保护环境(How to Protect the Environment) Good environment can make people feel happy and fit . To improve the environment means to improve our life. We should plant more trees and flowers around us . We shouldn’t cut them down . We should stop factories from pouring waste water into the river and waste gas into the air. Whenever we see litter on the ground , we should pick it up and throw it into dusbins. Never spit in public. Don’t draw on public walls. It’s our duty to protect the environment. 环保(environmental matter) The environmental matter is a hot topic nowadays. Not only does it affect our health, it also has a great impact on our future. Due to lacking of environmental concepts, people''''s health has been greatly affected by air, noise and water pollution. In order to live a better life, we need a cleaner world. We should now be concerned for environment by creating a better future for our next generation. In conclusion, the environmental matter is an important issue that directly affects very human in the world! 关于环境保护（水资源节约）的话题 Our environment is very important for our lives . We need the fresh air, the clean water and so on . In the past, there were many trees around us ,the air was fresh and the river was clean.But now,people cut down many trees. Air pollution and water polloution are very serious . The environment around us becomes very terrible . We should protect our environment. First, we should plant many trees to keep water. Second , we can ride a bike or walk to the school and work.. Third , we shouldn’t throw the dirty water into the river . Fourth, we shouldn’t use the plastic bags. Finally, we can ask more people to join us. 中考英语作文范文——中学生适当的放松方式 中学生学习时间长、压力大，专家建议学生每天课后应采取适当的方式放松自己。
某英文报“学生习作”专栏正在就“学生适当的放松方式”这一话题进行征文。
假设你是二十二中初三（3）班的班长，最近你对班上同学课后放松方式进行了调查。
请根据表格提供的调查信息和要求写一篇短文向该报投稿。
对 象 二十二中初三（3）班 人 数 60人（男：31人；女：29人） 常用放松方式 1.看电视（30人） 2.玩电脑游戏（12人） 3.听音乐（8人） 4.进行体育锻炼（5人） 5.没有时间放松（5人） 你的观点 哪一种（些）放松方式是适当的
为什么
注意： 1.短文包括对调查相关信息的介绍和你自己的观点； 2.词数：80-100。
题目和开头已为你写好，不记入总词数。
The Proper Way(s) for students to Relax I am the monitor of Class 3,Grade3,No.22Middle School.Recently I have made a survey of the students in my class on ways to relax after class. There are 60 students in my class(31 boys and 29 girls ).Different students have different ways to relax.Half of the students often watch TV.12students like to play computer games while 8 enjoy listening to music.5 students think doing sports is a good way and another five are busy to relax. (As we study too long every day and suffer from too much pressure,every student should choose proper ways to relax.In my opinion, watching TV or playing computer games is not a proper way to help us relax.)I thing taking exercise is a proper way because it can rest our brains and eyes. Besides,It can help improve our health.(Therefore,I often Play pingpong after class.It’s really helpful to both my health and my study.) 中考英语作文范文——体育运动的好处和坏处 体育运动的好处和坏处(Positive and Negative Aspects of Sports) a. 体育运动的好处 b. 体育运动可能带来的副作用 c. 我参加体育活动的体会 Sports do us good in many respects (TS). It goes without saying that taking exercises can build up our physical strength. In collective sports like basketball, volleyball, or football, we will learn the importance of cooperation. While taking part in sports game, we will try our best to win and arouse ourselves the competitive spirit. Sports can also help us relax after a period of exhausting work. However, as the saying goes, there are two sides to everything, and sports is without exception. We may hurt other players or ourselves if we are not careful enough when participating in sports activities. What''s more, excessive or severe training can do harm to our health. My participation in sports tells me that sports can make us healthy both physically and psychologically. It is also a good way for people to know each other and can promote friendship between people. So long as we are carefully enough, sports can do us nothing but good. 中考英语作文范文——北京之旅(A Trip To Beijing) On July 5th my parents took me to Beijing. We stayed at Huabei Hotel. On the first day, we went to the Great Wall. The Great Wall is very long and old. It has millions of bricks. Each brick is very big and heavy. Lots of people from different countries like climbing the Great Wall. We felt very tired when we climbed to the top of the Great Wall. We also went to the Palace Museum. The Palace Museum has 9999 palaces. It has a very long history. I bought a lot of souvenirs of the Palace Museum. What nice palaces these are! I visited the Palace Museum and felt excited. If you want to know more about the Palace Museum, you can go to Beijing and have a look. The following days, we went to the Summer Palace, Tian Tan, North Lake and Xiang Hill. I now know more about the history of China. I also like modern Beijing. The 2008 Olympic Games will be held in Beijing. Later, I went back with my parents by train. I really enjoyed the trip to Beijing 中考英语作文范文——坚持你的梦想 坚持你的梦想(Hold to Your Dreams) 提纲： 1．坚持梦想才有可能实现它。
2．举例说明。
Everyone has his dreams, but not all these dreams can come true. People give up their dreams for this or that reason. Those whose dreams become true have at least one thing in common, that is, they always hold fast to their dreams. Marie Curie, a famous scientist, has set a good example. In 1898, Marie found a new element in the pitchblende. In order to prove her discovery, she must get it and show it to the world. Then to get the new element became her dream and goal of her life. After four years'' hard work and refinement of tons of pitchblende, Marie and her hus-band at last saw the dim blue light of the new element -- radium. Her dream had come true. There are many other examples. Just around us, for instance, the athletes who gain the gold medals, the artists who are popular with the public, and even the students who enter tile university after years of hard study and preparation, are all dream-holders. Hold fast to your dreams, no matter how big or small they are. The path to dreams may not be smooth and wide, even some sacrifices are needed, but hold on to the end, you ,sill find there is no greater happiness than making your dream come true. 中考英语作文范文——我爱我的家 根据中文意思和英文提示词语,写出意思连贯、符合逻辑的英文文段。
所给的英文提示词语必须都用上；中文提示内容不必逐句翻译；根据英文提示,每组所写出的句数不限。
(共12分) 几年以前我家只有一间小屋。
三个人住一间屋真是艰难。
现在我们已经搬进了一套两室一厅 的单元房。
我非常高兴。
当我父母做. . . , 我能. . . 。
我爱我的家。
1. a few years ago, family, have one small room 2. it, be, three people, in the same room 3. now, a new flat(单元房), one living room, two bedrooms 4. be happy, my homework, quietly, my own room, my parents A few years ago, my family had only one small room. It was very hard for three people to live in the same room. Now we have moved into a new flat with one living room and two bedrooms. I''m very happy. I can do my homework quietly in my own room when my parents do the housework or other things. I love my home. 中考英语作文范文--我的家乡 请你根据下面的提纲，以“我的家乡”为题，写一篇100—120字的短文。
提纲： (1) 家乡的地理位置； (2) 解放前的情况； (3) 解放后的变化； (4) 对家乡的感情。
My Home Town My home town is a beautiful place. It stands beside a wide river and is rich in fish and rice. But in the old days it was a poor and backward little town. Many people had no work. They lived a hard life. In 1949 my hometown was liberated. Since then great changes have taken place there. The streets have been widened. Factories, schools, hospitals, cinemas and theatres have sprung up one after another. The life of the people is greatly improved. I love my hometown. All the more I love its people. They are working hard so as to make it still richer and more beautiful.(网络资源 ) [责任编辑：yumiao]
全球变暖演讲稿 800字左右
全球变暖可能造成的影响 全球变暖将给地球和人类带来复杂的潜在的影响，既有正面的，也有负面 的。
例如随着温度的升高，副极地地区也许将更适合人类居住；在适当的条件下， 较高的二氧化碳浓度能够促进光合作用，从而使植物具有更高的固碳速率，导致 植物生长的增加，即二氧化碳的增产效应，这是全球变暖的正面影响。
但是与正 面影响相比，全球变暖对人类活动的负面影响将更为巨大和深远。
今年8月份CCTV报道，由于气候变暖的影响，珠穆朗玛峰的顶峰下降了1.3米。
祁连山冰川缩减危及河西走廊：近年来，祁连山冰川融化比上个世纪70年代减少了大约10亿立方米，冰川局部地区的雪线正以年均2-2.6米的速度上升。
专家分析，冰川退缩，雪线上升除自然气候因素外，另一个主要原因是人口膨胀，超载超牧，过度开垦，乱砍滥伐，滥采地下水有关。
《中国环境报》2004-9-16 1、海平面上升的影响 过去的百年海平面上升了14．4cm,我国上升了11．5cm。
海平面升高的原因，主要是海水热膨胀，当海洋变暖时，海平面则升高。
全球升温会引起地球南北两极的冰山融化，这也是造成海平面上升的主要原因之一。
海平面上升的直接影响有以下几个方面： (1) 低地被淹： 英国加高堤坝应对气候变暖 全球变暖使海平面升高，暴风雨频率增加，这使英国人不得政治面目 加高防洪堤坝。
据英国官方近日公布的统计数据，在过去的20年中，由于泰晤士河的水位随全球变暖而升高，当地政府机构不得不先后88次加高防洪堤坝，以保障伦敦人的生命财产安全。
，据悉，人们现在平均每年4次加高其堤坝。
据估计，在2030年以前，其加高堤坝的频率会达到每年30次。
钟和 中国环境报2004-10-19 (2) 海岸被冲蚀 (3) 地表水和地下水盐分增加，影响城市供水。
（4）地下水位升高。
(5) 旅游业受到危害(海平面上升50米,大连、秦皇岛、青岛、北海、三亚滨海旅游区向后31-366料，沙滩损失24%，北戴河沙滩损失60%。
2002年中国国土资源公报报道，沿海旅游业已成为第一大产业，其产值为2503亿元，占海洋产业总产值的34.6%。
（6） 影响沿海和岛国居民的生活(占世界1／3的人口)，使之受到威胁。
如果极地冰冠融化，经济发达、人口稠密的沿海地区会被海水吞没，马尔代夫、塞舌尔等低洼岛国将从地面上消失，上海、威尼斯、香港、里约热内卢、东京、曼谷、纽约等海滨大城市以及孟加拉、荷兰、埃及等国也将难逃厄运。
2、对动植物的影响 气候是决定生物群落分布的主要因素，气候变化能改变一个地区不同物种的适应性并能改变生态系统内部不同种群的竟争力。
自然界的动植物，尤其是植物群落，可能因无法适应全球变暖的速度而做适应性转移，从而惨遭厄运。
以往的气候变化(如冰期)曾使许多物种消失，未来的气候将使一些地区的某些物种消 失，而人些物种则从气候变暖中得到益处，它们的栖息地可能增加，竞争对手和 天敌也可能减少。
比如说桔子，过去20世纪70年代，它的最北的边界线是在黄 山一线，宣城市也曾经试种过，但到冬天的一场大雪，树木就冻死了。
但现在我 们校园里的桔子树都长得很好。
又如，扬子鳄只生活在宣城、泾县和南陵这样狭 小的地带，如果北界线北移，扬子鳄可能会自然绝种。
这是从我省的局部地区来 讲。
从全国来讲，我国把冬季1月0度等温线作为副热带北界，目前这一界线处 于我国秦岭-淮河一带。
研究发现，气温升高会使这一界线北移至黄河以北，徐 州、郑州一带冬季气温将与现在的杭州、武汉相似。
3、对农业的影响 一年中温度和降水的分布是决定种植何种作物的主要因素，温度及由温度引起降水的变化将影响到粮食作物的产量和作物的分布类型。
气候的变化曾经导致生物带和生物群落空间(纬度)分布的重大变化。
如公元800-1200年北大西洋地区的平均温度比现在高1℃，使玉米在挪威种植成为可能，但到了公元1500-1800年，西欧出现小冰川期，平均气温也只比现在低1-2℃，就造成了挪威一半农场弃耕，冰岛的农业耕种活动则几乎全部停止。
除此之外，全球变暖还会使高温、热浪、热带风暴、龙卷风等自然灾害加重。
因此，全球气温升高后，世界粮食生产的稳定性和分布状况将会有很大变化。
4、对人类健康的影响 人类健康取决于良好的生态环境，全球变暖将成为下个世纪人类健康的一个 主要因素。
极端高温将成为下世纪人类健康困扰变得更加频繁、更加普遍，主要 体现为发病率和死亡率增加，尤其是疟疾、淋巴腺丝虫病、血吸虫病、钩虫病、 霍乱、脑膜炎、黑热病、登革热等传染病将危及热带地区和国家，某些目前主要 发生在热带地区的疾病可能随着气候变暖向中纬度地区传播。
帮忙想一个与气候变暖或寻求低碳经济之路有关的演讲主题
世界自然基金会（简称WWF，过去叫做World Wildlife Fund Intenational——世界野生生物基金会，现在更名World Wide Fund for Nature）于1961年9月11日成立于瑞士一个风景秀丽的小镇——莫尔各斯（Morges），创始人是英国著名生物学家，曾任联合国教科文组织第一任总干事朱立安·赫胥黎先生。
其基本目标是保护地球的生物资源。
40多年来，在多方的支持下，WWF成长为一个极具影响力的独立性非政府国际环境保护组织。
WWF是在全球享有盛誉的、最大的独立性非政府环境保护机构之一，在全世界拥有将近500万支持者和一个在90多个国家活跃着的网络。
1980年，WWF正式来到中国，1996年在北京设立了办事处，此后陆续建立了七个项目办公室；发展至今，共拥有70多名员工，开展了包括物种、森林、淡水、能源与气候变化、环境教育和野生物贸易等多方面的工作。
WWF的使命是遏止地球自然环境的恶化，创造人类与自然和谐相处的美好未来。
为此WWF致力于： World Wide Fund for Nature (the WWF, over the past called the World Wildlife Fund Intenational - World Wildlife Fund, now renamed World Wide Fund for Nature) in September 11, 1961 Switzerland was established in a beautiful small town - Moore the Andean (Morges), the founder of the United Kingdom are well-known biologist, served as the first UNESCO Director-General, Mr. Julian Huxley. The basic aim is to protect the Earth's biological resources. For over 40 years at multi-party support, WWF grown into a most influential independent international non-governmental environmental protection organization. WWF is the world renowned, the largest independent non-governmental environmental protection organizations, all over the world at almost five million supporters and a country at more than 90 active networks. 1980, WWF officially came to China in 1996 opened an office in Beijing, after being set up seven Project Office; development so far, a total of more than 70 employees, carried out, including species, forests, freshwater, energy and climate change , environmental education and wildlife trade, and many other job. WWF's mission is to curb the deterioration of the Earth's natural environment and create harmony between mankind and nature of a better future. WWF is committed to this end:
