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。
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.
有关全球气候变暖的英语演讲稿
Global WarmingThere is little doubt that the planet is warming. Over the last century, the planets temperature has risen by around 1 degree fahrenheit (0.6 of a degree celsius). The warmest since the mid 1800’s was the 1990s. The hottest years recorded were 1997, 1998, 2001, 2002, 2003. The United Nations panel on climate change projects that the global temperatures will rise 3-10 degrees fahrenheit by the century’s end - enough to have the polar caps all but melted. If the ice caps melt, a vast majority of our countries borders will be under water. Monuments and great buildings, as well as homes and lives will be under water, including New York City.So now we know what some of the causes are for global warming, how can we as individuals do our part to help save the planet?The answer is simpler than you may think. You don’t have to go miles away from home to protest, or spend masses of money. If you try to follow the few simple steps that I shall now give you, you will have started to help us all.Firstly, plant a tree. This could be easier than it sounds. Join or help out a local wildlife group and ask to plant a tree. Trees, when fully grown, will help keep the planet cooler. On the same point, you could protest against the demolition of the rainforests. This is the same principle, we need the trees to cool our planet and yet they are chopping them down to create roads or homes.Something as simple as walking instead of taking the car will help reduce pollution. As well as stopping pollution, you are giving yourself exercise, something important for our bodies. So the next time you get into your car, or your motorbike, think - do I have to make this journey by vehicle or can I walk?When you are at home, and your getting a little cold. Put a jumper on and do not adjust the heating. The extra heat produced by our homes also affects the planet. So try wearing an extra layer in winter.If possible, buy your fruit and vegetables from local suppliers. And try to avoid imported goods. The more foreign food that we import the more pollution from aeroplanes and boats it will create.Keeping to the speed limit can also help the environment. The more you speed the more petrol you are going to use, making the pollution higher. Also, SUV’s make about six times their own weight in CO2 each year. A small efficient diesel car covering the same distance not only uses much less fuel; it makes two thirds less.If possible use solar energy, after all it is free; all you need to buy is the equipment. You can get much of your hot water and heating from the sun and even generate electricity. Reduce, reuse and recycle. Only buy what you need; don’t stock the cupboards with things you may or may not use. Reuse whatever you can, like containers and paper, and recycle what you cannot reuse. It really is as simple as that.Finally turning off unused sources of power such as televisions and heaters will help the environment, as well as save you money.If everybody stuck to these rules, we would be doing a great thing by protecting the earth. So please take into consideration what I have said, and try to do your part. After all, it will be our next generation that will feel the effects.
!!!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.
速求一篇“我身边的变化”演讲稿。
符合新疆基层或者新疆实际的，谢谢
我和我的古城五月的和田鲜花盛开，我们迎来了《身边的变化》主题演讲。
傍晚，漫步乡间小道我们能随意撞上孕育农牧民希望的苹果、红枣、羊群。
微风中含着玫瑰花的气息，迎着花香我们来到了玫瑰园，与玫瑰撞了个满怀。
猛一抬头，夕阳的余晖撒满了每一个角落，哪有“羌笛何须怨杨柳，春风不渡玉门关”的悲伤，我们和田人民处处享受到了党的惠民政策，和田人民是一只反哺鸟，大恩不言谢，在西部大开发、新疆工作座谈会议指引下我们大胆探索、创新，在对口支援省市的关怀下，我们奋起直追，树立后发赶超的决心和雄心，我们不愧于党、不愧于人民。
在党中央的关怀下，和田的变化真可谓“忽如一夜春风来，千树万树梨花开。
”库尔班吐鲁木骑着毛驴上北京看望毛主席，让人们传为佳话，从侧面反映了当时新疆铁路事业的落后，今年6月，喀和铁路即将投入营运，我们的铁路梦正在实现，同时，农产品、手工制作可以通过铁路以较低的成本运输到喀什，与巴基斯坦、塔吉克斯坦、吉尔吉斯斯坦等国家开展边境贸易。
喀和铁路投入营运后，将促进和田经济发展，改善和田投资环境，提高农牧民收入。
我们亲切地称喀和铁路——“钢铁丝绸之路”。
除了铁路的发展，还有民航的发展。
随着人们生活水平的不断提高和机票价格的不断降低，老百姓越来越愿意选择安全快捷的飞机出行。
据民航工作人员介绍，今年春运期间，和田机场共起降航班326架次、旅客吞吐量35213人次、同比增长40%。
我的同事也感慨地说：“新疆不再遥远，赶上十一长假就可以飞到内地看看父母。
民航的发展像磁铁吸引铁屑一样吸引着无数游客不远千里万里跋涉的脚步，带着无限的向往和探寻的决心，朝圣般向和田奔来，毫无疑问民航的发展助推了和田旅游的发展。
来过和田的朋友都知道，和田气候干燥，这里年降水量不足35毫米，蒸发量却是2450毫米。
“瓜果好吃树难栽”，成为和田人民曾经广为流传的一句话。
如今，这句话被和田人民改为“面对困难不退缩，敢叫戈壁换绿装”的战斗口号，我们“向大漠戈壁宣战，建设绿色家园”的决心很大，从部队官兵到公务员，从个体经营户到普通老百姓每年都积极投身到植树造林，绿化城市的活动之中，硬叫昔日的荒漠长出了一条“绿飘带”。
走近和田，我们发现，玉都古城不断变得时尚。
听老人说，以前八个字便能概括和田这座城市的特征，“一座公园、一个巴扎”。
如今，古城旧貌换新颜，我们用古老与时尚相交融的新概念，为这个城市进行了重新定义；融购物、休闲为一体的步行街、民街，是古城跨入时尚的一扇扇大门，实现了古老与现代的完美对接。
有时走在大街上，人来人往，车水马龙，真让我有一种走错地方的感觉，这里是和田吗
看到打扮时尚的维吾尔少女悠然地从身边经过，不由感到，古城和田不正像维吾尔少女质朴与时尚融合，略带羞涩地展现着自己耀眼的青春与靓丽吗
今天的和田犹如洗尽俗尘的仙子，在科学发展观的引领下，勤劳善良的和田人民正大手笔、高起点为世人展现了一幅积极向上，时尚文明、博大精深的奋斗画卷，我们创造美好生活、建设新和田的理念，正在城市日新月异的变化中创新、升华。
最后让我们以创先争优为契机，携承诺同行，做英雄和田人。
关于环保的演讲稿
气候变化 快过年了，我又与爸爸妈妈一起，从温暖的南方来到了寒冷的北方。
虽然天气十分寒冷，但我的心头热乎乎的。
今天，我们到了北方的海边城市青岛。
这里的天气非常冷，比杭州冷多了。
一出门，我就感觉到一阵冷风直刺我的身上，凉飕飕的。
马路旁的树木光秃秃的，好像一个个枯瘦的老人，在寒风中经受煎熬。
地上还有积雪，我踩上去行走，发出“沙沙”的声音。
有的地方还结了冰，走在上面很滑，一不小心就会摔跤的哦，我有几次经历了这样的危险。
不过，北方有一点与杭州不同，虽然外面天寒地冻，但一到屋里就非常暖和，因为普遍安装着暖气。
杭州的室外天气比青岛要暖和不少，路旁还有许多树木没有掉叶，有的还郁郁葱葱，地上也找不着雪，河里还是流淌着水，结冰的情况也很难看到哦。
但是，杭州的室内温度比青岛冷多了，简直跟室外差不多。
这使我不由得想起了刚刚结束的的三亚之行，我在那儿时还穿裙子呢。
三亚是一年四季都不冷的，冬天也看不到雪和冰，听说夏天也不是很热，真是四季如春啊
祖国幅员辽阔，气候相差很大。
短短的几天时间，我就体验了三个城市的气温变化，经历了春秋和严冬。
