关于空气污染的演讲稿100字数
大家好。
今天我所演讲的题目是空气污染.空气污染是大气科学的一个新分支，它是研究在不同气象条件下，进入大气的污染物在大 气中输送、扩散稀释、转化和移除的规律及应用的科学。
本学科萌芽于20世纪20年代， 1921年英国人便进行大气扩散试验，但只是到了50年代后，现代工业的发展和城市人 口高度集中，相继出现了严重的城市或工业区污染事件，以1952年12月的伦敦烟雾事 件为例，夺去了四千多人的生命，这些促使人们对大气污染的广泛关注和研究，到60 年代便逐渐形成这门独立的新学科。
空气污染 由于人类活动或自然过程，向大气中排进了一些有害物质(称污染物)，当排入量够多(污染物浓度达一定限度)，则使原来洁净空气的品质下降，若这种情况维持时间 够长，便会对人类、动物、植物和大气中的物品产生危害和不良影响，这种大气状态称为空气污染。
组成空气污染有三个要素：污染源、污染物浓度、对人和生物有危害。
洁净大气是人类赖于生存的必要条件之一，一个人在五个星期内不吃饭或5天内不 喝水，尚能维持生命，但超过5分钟不呼吸空气，便会死亡，人体每天要吸10—12立方 米的空气。
由此可见，消除空气污染或保持污染浓度低于某个限度之下，是何等重要。
污染源与污染物向大气排入有害物质的源地称污染源，进入大气的有害物质称污染物。
大气污染源分人工源和自然源， 大气污染的危害与影响 大气污染对人类及其生存环境造成的危害与影响，已逐渐为人们所认识，归结起来有如下几个方面： ①对人体健康的危害。
人体受害有三条途径，即吸入污染空气、表面皮肤接触污染空气和食入含大气污染物的食物，除可引起呼吸道和肺部疾病外，还可对心血管系统、 肝等产生危害，严重的可夺去人的生命。
②对生物的危害。
动物因吸入污染空气或吃含污染物食物而发病或死亡，大气污染物可使植物抗病力下降、影响生长发育、叶面产生伤斑或枯萎死亡。
③对物品的危害。
如对纺织衣物、皮革、金属制品、建筑材料、文化艺术品等，造成化学性损害和玷污损害。
④造成酸性降雨，对农业、林业、淡水养殖业等产生不利影响。
⑤破坏高空臭氧层，形成臭氧空洞，对人类和生物的生存环境产生危害。
⑥对全球气候产生影响，如二氧化碳等温室气体的增多会导致地球大气增暧，导致全球天气灾害增多，又如烟尘等气溶胶粒子增多，使大气混浊度增加，减弱太阳辐射， 影响地球长波辐射，可能导致天气气候异常。
如何防治大气污染，减轻大气污染的危害与影响，构成了当今重大而紧迫的研究课题。
大气污染的防治 防治大气污染是一个庞大的系统工程,需要个人、集体、国家、乃至全球各国的共同努力，可考虑采取如下几方面措施： ①减少污染物排放量。
多采用无污染能源（如太阳能、风能、水力发电）、改革能 源结构，用低污染能源（如天然气）、对燃料进行预处理（如烧煤前，先进行脱硫）、改进燃烧技术等均可减少排污量。
另外，在污染物未进入大气之前，使用除尘消烟技 术、冷凝技术、液体吸收技术、回收处理技术等消除废气中的部分污染物，可减少进 入大气的污染物数量。
②控制排放和充分利用大气自净能力。
气象条件不同，大气对污染物的容量便不同， 排入同样数量的污染物，造成的污染物浓度便不同。
对于风力大、通风好、湍流盛、对流强的地区和时段，大气扩散稀释能力强，可接受较多厂矿企业地逆温的地区和时 段，大气扩散稀释能力弱，便不能接受较多的污染物，否则会造成严重大气污染。
因 此应对不同地区、不同时段进行排放量的有效控制。
③厂址选择、烟囱设计、城区与工业区规划等要合理，不要排放大户过渡集中，不 要造成重复迭加污染，形成局地严重污染事件发生。
④ 绿化造林，使有更多植物吸收污染物，减轻大气污染程度。
通过以上的讲解，大家知道空气对于我们人类的重要性了吧，从现在开始请大家保护环境，植树造林，创造个美好的生活环境吧
刮风可以吹散雾霾，根治还是要解决工业污染，全民齐心对抗雾霾保护环境，雾霾天出门还是要戴口罩的，普卫欣美国进口的天猫有，能有效过滤pm2.5今天，我的国旗下讲话就是这些，谢谢大家。
有关环保的英语演讲稿，3-5分钟左右
（1） With the improvement of our living standard, more and more people can afford a car. As a result, our roads are more often than not crammed with cars. However, with more and more waste gas being discharged by the cars, the problem of air pollution becomes even more serious. So nowadays we advocate to lead a low-carbon life. My suggestion is we should ride bikes more often instead of driving cars.By riding a bike, we can not only exercise our body but also protect our environment. Why not have a try, my dear friends? 与我们的生活水平的提高,越来越多的人都买得起汽车的。
因此,道路往往没有堆满了汽车。
然而,随着越来越多的废气排放是汽车、空气污染问题变得更加严重。
所以现在我们提倡过低碳的生活。
我的建议是我们应该更经常骑自行车而不是开车骑一辆自行车,我们不仅能锻炼身体,也能保护我们的环境。
为什么不试试,我亲爱的朋友?（2） Now, our side of the car constant more up, the environment also increasingly worse! That the air around us there are many harmful substances. Therefore, we want to Sue around things start to do. For example, we can go to school by bike or walk, it can exercise. If you have time can use less elevator, many climb stairs. We can not only physical exercise, but also to protect our environment. 现在，我们身边的汽车不断的多了起来，环境也越来越糟糕
以至于我们周围的空气有很多有害物质。
所以，我们要苏身边的小事做起。
比如，我们可以骑自行车上学或者步行，这样还可以锻炼身体。
有时间的话可以少用电梯，多爬楼梯。
我们不仅能锻炼身体,也能保护我们的环境。
（3）文章文体：议论文。
文章要点：1.保护环境的重要性；2.学生在家庭中节约能源的具体做法和感想；3.今后的打算。
文章框架：文章应该是三部分两段式。
第一段（包括要点前两部分）1.环保的重要性；2 接着是站在学生的角度谈谈家庭节约能源的具体方法，第二段写第三要点，即谈谈今后打算。
重要句型短语：It is important to protect our environment, the energy in the world is limited. turn off the light and other appliance when you ,re not using them, we'd better not waste the energy, use public transportation, recycle the waste，I can learn more to develop new and clear energy, like the energy from the wind and solar 等。
参考例文： With the development of our society, energy in the world becomes more and more limited, so it is quite important for us to save energy and to protect our environment. As a student, there are a lot of methods we can do to save energy at home. For example, first, we can turn off the light as well as other appliances when we are not using them. Second, recycle the waste water, paper and other waste so that we can reuse them. What's more, it is suggested to use public transportation more instead of private cars. Above all, everyone can make a great contribution to our environment. I hope I can learn more to develop new and clear energy, like energy from the wind and solar.（4）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。
) （5） There are still many problems of environmental protection in recent years. One of the most serious problems is the serious pollution of air, water and soil. the polluted air does great harm to people’s health. The polluted water causes diseases and death. What is more, vegetation had been greatly reduced with the rapid growth of modern cities.To protect the environment, governments of many countries have done a lot. Legislative steps have been introduced to control air pollution, to protect the forest and sea resources and to stop any environmental pollution. Therefore, governments are playing the most important role in the environmental protection today.In my opinion, to protect environment, the government must take even more concrete measures. First, it should let people fully realize the importance of environmental protection through education. Second, much more efforts should be made to put the population planning policy into practice, because more people means more people means more pollution. Finally, those who destroy the environment intentionally should be severely punished. We should let them know that destroying environment means destroying mankind themselves.保护环境目前环保还存在着许多问题。
最严重的问题就是空气、水和土壤的严重污染。
污染的空气对人类的健康十分有害。
污染的水引起疼病，造成死亡。
更有甚者，随着现代社会的迅速扩建，植被大大的减少。
为了保护环境，各国政府做了大量的工作。
采用了立法措施控制大气污染，保护森林资源和海洋资源，制止任何环境污染。
因此，在当今的环保中政府起着最重要的作用。
我的看法是，为了保护环境，政府应当采取更具体的措施。
首先，应当通过教育的方法使人们充分謒到环境保护的重要性。
第二，应更加努力把计划生育政策付诸实施，因为人口多就意味着污染严重。
最后，要严惩那些故意破坏环境者。
使他们破坏环境就是毁灭人类自己。
Hello: everyone!Now I want to talk about a beatiful world! When I was young,I always dreamed that I lived in a beautiful country. There were many flowers and trees around our city.We counld hear the birds singing and see the children dancing. The streets were clear and the the air was very fresh! How nice it was!But that only was a dream of mine!How I wish that it would be come true! So I think we should do something to protect our environment. Everyone should make a contribution to protect the environment. Taking care of our environment is very important.Where ever you live,you can do something around your neighbourhood. Have you ever thrown any litter onto the ground?Have you ever drawn pictures on public walls? Have you ever cut down trees?If your answers are No,it means that you have already helped protect our environment. It is our duty to keep our envionment clean and tidy. You might ask yourself,Have I ever picked up some rubbish and thrown it into a box?Have I ever collected waste paper or bottles for recycling?Have I ever planted any trees or flowers in or near my neighbourhood?If your answers areYes,it means that you have already done something useful to improve the environment. Now I want to say :Let`s do our best to make our world more beautiful!望采纳
环境污染的演讲稿
近年来，随着地区经济的迅猛发展，环境污染问题也越来越严重，防止环境污染，保护环境，维持生态平衡，已成为社会发展的一项重要举措，也是每个公民应尽的义务。
\ 以下是实地调查出来的报告：\ 造成环境污染的污染源是：1、公共厕所排出的粪便散发出难闻的气味，让人恶心。
2、工厂排出的废水又黑又臭，还浮着一些秽物。
3、工厂排出的废气很刺鼻，会散发到小镇的各个角落。
4、化肥厂排出的气体中含有粉尘、铅、煤灰等对人体有害的物质。
5、公园的草坪上常有游人丢弃的垃圾，既不卫生，又影响市容。
\ 造成环境污染的污染物是：废水、废气、粪便、腐肉、塑料袋、木筷，垃圾等。
\ 污染物对环境和生物有很大的危害：使空气变得浑浊，对人的肺部有很大危害；生活垃圾处理不好会滋生细菌，严重影响人的健康；污水会影响生活水，直接侵害人体。
\ 看了这么多，你是不是对目前的环境有些忧虑呢
对，环境与我们的生活密切相关，保护环境卫生从我做起，从现在做起：不随地吐痰；不乱扔垃圾；拒绝使用一次性木筷；废弃电池和塑料袋要处理好；多植树造林，不践踏草坪；不污染水源。
保护环境，我们责无旁贷
请问谁有苏教版牛津英语初中和小学的上学期的期末复习资料
7A Unit 1 This is me!1、a. 长的2、a. 短的3、a. 乐于助人的，有帮助的4、a. 每一，每个的5、a. 苗条的6、a. 强壮的,强大的7、a. 身体好的8、a. 深色的;黑暗的9、a. 下一个的;紧接着的;ad. 接着，随后10、a. 有礼貌的，客气的11、a.好极的;使人快乐的12、abbr.光盘(compact disc的缩写)13、ad. 经常14、ad. 努力地; a. 困难的15、ad. 然后，那时；那么16、ad. 通常17、ad. 有时18、ad. 又,再19、ad. 真的,真正地20、ad. 总是21、n. (外)祖父(母)22、n. （一）天，（一）日23、n. 比赛,竞赛24、n. 餐馆25、n. 成员26、n. 诞生地27、n. 电子狗28、n. 队,组29、n. 绘图30、n. 年31、n. 年级; 32、n. 年龄33、n. 排球；排球运动34、n. 散步；步行35、n. 数学36、n. 体育，体育运动37、n. 午餐时间38、n. 橡皮39、n. 小时40、n. 新闻,消息41、n. 兴趣小组，俱乐部42、n. 业余爱好43、n. 音乐44、n. 游泳45、n. 鱼; 鱼肉46、n. 羽毛球47、n. 阅读48、n. 正餐，宴会49、n. 周末50、n. 主人51、n.& vi. 散步,步行52、n.（球赛等的）得分53、n.[复数]眼镜54、n.功课;（一节）课55、n.球场56、n.运动员,选手57、prep. 在...之后;conj. 在...以后;ad. 以后,后来58、pron. 每个人59、pron. 某人60、vi. 出生61、vi. 飞; vt. 放飞；放（风筝等）62、vi. 跑,跑步，奔跑63、vi.& vt. 开始64、vi.听起来; n. 声音65、vi.游泳66、vt. （向别人）借 ,借用67、vt. 戴；穿68、vt. 说,讲69、vt.& n. 得分70、vt.& vi. 吃71、vt.& vi. 懂得，理解72、vt.& vi. 开始73、vt.& vi. 赢得,赢，获胜74、vt.喜欢75、许多76、游泳池77、足球场7A Unit 2 My day1、vt. 想要2、a. & ad. 最好（的）(good和well的最高级)3、a. 聪明的,伶俐的4、a. 忙的,忙碌的5、a. 每个的,每一 6、a. 许多的;大量的 ad.非常; 更加7、a. 准备好的8、a.& ad. 第一（的）; 首先 9、a.& ad.更好的; 更好地(good或well的比较级)10、a.关闭的;封闭的11、a.难的，困难的12、ad. 大概,也许13、ad. 两次;两倍 14、ad. 确实，完全（用于加强语气）;仅仅，只是15、ad. 一起，共同16、ad. 在外面17、adj. 课外的18、conj. 因为19、excl.(用于请求别人重复)什么，请再说一遍20、modal verb将, 将要21、modal verb应该,应当22、n. 报纸23、n. 部分,24、n. 成人，成年人25、n. 答案 vt.回答26、n. 地点,位置27、n. 活动28、n. 家庭作业29、n. 价格30、n. 理由31、n. 连环图画,32、n. 旅行,旅程 33、n. 模型,模特儿; 34、n. 区,地区35、n. 世界36、n. 图书馆37、n. 晚餐38、n. 问题39、n. 希望,愿望,40、n. 信41、n. 信息42、n. 星期,周43、n. 星期二44、n. 星期三45、n. 星期四46、n. 星期五47、n. 星期一48、n. 英特网，互联网49、n. 游泳者50、n. 种类51、n.电子邮件; 邮件52、n.享乐，乐趣;逗乐; a.有趣的53、prep. 除了...之外,不包括54、pron. & a. 两者;双方55、v. 睡觉,睡眠,56、vi. 说话,谈话;n.演讲;讲座57、vi.& n. 聊天,闲谈58、vi.& vt. 锻炼59、vi.& vt. 练习，操练60、vt. 不喜欢,厌恶; n. 厌恶的对象61、vt. 发送；运送62、vt. 花费（金钱、时间等）,度过63、vt. 使用64、vt. 组织65、彼此，互相66、期待；盼望67、醒过来；叫醒7A Unit 3 Let’s celebrate!1、《美猴王》2、a. 出色的，极好的3、a. 传统的4、a. 热的5、a. 特别的,特殊的6、a. 兴奋的7、a. 有趣的8、a. 自己的9、a.尖的；锋利的 10、ad. 为什么11、adj.冷的; 寒冷的12、conj. 当...的时候13、conj. 如果，假如14、conj.因此,所以15、Modal v 必须16、n. 八月; a. 威严的,尊严的17、n. 不招待就使坏18、n. 厨房19、n. 春天；春季20、n. 灯笼21、n. 地方22、n. 电影;胶卷23、n. 冬季,冬天24、n. 恶作剧25、n. 二月26、n. 方式，方法27、n. 服装,戏装28、n. 光,光线29、n. 鬼30、n. 会议，集会31、n. 火车,32、n. 假期,假日33、n. 节日34、n. 九月35、n. 卡片36、n. 蜡烛37、n. 脸38、n. 邻居39、n. 六月; 琼（女名）40、n. 米饭,稻；大米41、n. 面具42、n. 南瓜43、n. 七月44、n. 铅笔袋,铅笔盒45、n. 钱；货币46、n. 巧克力47、n. 切，割48、n. 秋季,秋天49、n. 日期50、n. 三月;51、n. 圣诞节52、n. 狮子53、n. 十二月54、n. 十一月55、n. 十月56、n. 食物，食品57、n. 四月58、n. 糖果59、n. 万圣节前夜（10月31日夜晚）60、n. 五一国际劳动节61、n. 五月; aux.可能,可以,祝愿62、n. 午夜63、n. 夏季,夏天64、n. 星期六65、n. 星期日66、n. 牙齿67、n. 一月68、n.& vt. 招待69、n.次数70、n.火鸡71、n.西方,西面72、n.烟火；烟花73、n.饮料; vt.& vi.喝,饮;喝酒74、n.月饼75、prep. 通过，靠，用（表示通过某种方式）76、prep.穿过,通过77、prep.作为，当作;像…… 78、v. 完成,结束79、vi. 钓鱼,捕鱼,80、vi. 发光,照耀，闪耀81、vi.& n.敲，击打攻击82、vt & vi. 庆祝83、vt. 把……叫做;给……命名84、vt. 给……涂色85、vt.& vi. 喊叫86、vt.给……穿衣服;n.服装87、端午节88、感恩节89、国庆节90、红包91、教师节92、六一儿童节93、元旦94、中秋节95、粽子7A Unit 4 Food1、a. 饥饿的2、a. 健康的,有益健康的3、a. 空闲的；自由的4、a. 疲劳的,累的5、a. 容易的,简单的6、a. 甜的; n. 糖果7、a. 小心的,仔细的8、a. 圆的,9、a. 重要的10、a.拔尖的，头等的; n.顶，顶部11、a.健康的，结实的12、ad. 从不；决不13、ad. 很少，不常14、ad.& a. 快15、ad.总体上说16、int.哇17、n. （猪、牛、羊等的）肉18、n. 饼干19、n. 长沙发20、n. 超级市场,超市21、n. 刀，餐刀22、n. 分数；点23、n. 故事24、n. 果汁;蔬菜汁25、n. 汉堡包26、n. 胡萝卜27、n. 花生28、n. 架子29、n. 健康,卫生,保健30、n. 卷心菜31、n. 卡,卡路里(热量单位)32、n. 可口可乐33、n. 篮球34、n. 零食35、n. 芒果36、n. 面包37、n. 面条38、n. 柠檬39、n. 牛奶40、n. 牛肉41、n. 瓶子42、n. 清单43、n. 人44、n. 日常饮食45、n. 生活方式46、n. 蔬菜47、n. 数量48、n. 水49、n. 水果50、n. 汤51、n. 糖52、n. 跳舞者，舞蹈演员53、n. 土豆，马铃薯54、n. 碗55、n. 维他命，维生素56、n. 问卷57、n. 西红柿58、n. 盐59、n. 运气60、n. 猪肉61、n. 祝贺62、n. 祖父；外祖父63、n.茶64、n.搭档，合作伙伴65、n.溜旱冰66、n.绵羊67、n.能量68、n.能量69、n.千克，公斤70、n.小包; （一）包71、n.一餐饭72、n.纸盒;牛奶盒;糖果盒73、prep. 像,像……一样74、prep. 在...前面75、prep. 在...之间76、prep.没有，不77、prep.少于78、v. 感觉,感到79、vi. 躺,卧；说谎80、vi.& vt.学习81、vt. 搬运,运输；携带82、vt. 保持83、vt. 买84、vt.& n. 需要,必需;85、vt.& vi. 改变;变化86、vt., vi & n. 计划,87、vt.讨厌，恨7A Unit 5 Going shopping1、a. & n. 灰色(的)2、a. 昂贵的3、a. 便宜的4、a. 大的5、a. 漂亮的，美丽的6、a. 贫穷的,可怜的7、a. 足够的8、a.高的9、a.年幼的；小的;少的10、ad. 相当，非常11、ad. 也12、ad. 已经13、ad.此刻,现在14、ad.但是15、n. （不干胶）贴纸16、n. 笔记;短信，便条;注解,注释17、n. 笔记本18、n. 冰淇淋19、n. 尺寸,大小20、n. 大卖场，大型购物中心 21、n. 地区,区域22、n. 店主；售货员23、n. 分钟24、n. 国家25、n. 夹子26、n. 家电商场27、n. 轮次28、n. 牛仔裤29、n. 裙子30、n. 书店31、n. 双,对,副32、n. 随身听33、n. 玩具熊34、n. 文具35、n. 靴,长筒靴36、n. 悠悠，溜溜球37、n. 折扣,打折38、n. 中心39、n. 主意,想法40、n.出租车41、n.出租车停靠站42、n.公共汽车车站43、n.钱包，皮夹子44、n.书写纸；稿纸；信纸45、n.相册46、n.校长47、prep. 在...外;ad. 在外面; 48、prep.& conj. 在...以前ad. 以前;49、prep.在...里面;ad.在里面50、pron.& ad. 更多,更加,更 51、pron.某事，某物52、v.与……相配53、vi. 等，等候54、vi. 哭,喊55、vi. 停留,逗留，呆56、vi.（鞋）合脚；（衣服）合身 57、vt. 捐赠58、vt. 募集59、vt. 邀请60、vt.& n. 拜访,访问;看望61、vt.& vi. 付钱；给……报酬62、vt.收集63、vt.值（多少钱）；花费64、不要紧。
没关系。
65、你的真挚的66、稍等片刻7A Unit 6 Fashion1、a. （人或服装）时髦的，帅的；聪明的2、a. 乏味的，无聊的3、a. 懒惰的4、a. 年轻的5、a. 轻的,6、a. 时髦的，现代的7、a. 适当的；相配的8、a. 舒服的，舒适的9、a. 重的,厚的;超出一般的10、a.& n.粉红色（的）11、a.酷的12、a.受欢迎的；流行的13、a.颜色艳丽的14、ad. 当然，行15、ad. 仍,还16、ad. 最后17、ad.后来,以后18、n. 材料19、n. 风格,式样20、n. 海报,招贴画21、n. 时装,时尚，风尚 22、n. 丝,绸23、n. 套装,一套衣服24、n.（软底）运动鞋25、n.表演；演出；节目26、n.短裤27、n.领带; 领结28、n.棉，棉布；棉花29、n.皮，皮革30、n.套头衫31、n.羊毛32、pron. 任何一个33、v.由…制成34、vt. & n.希望35、vt. 选择36、vt.& n. 设计
跪求，“保护美丽校园，保护我们的家”演讲稿，要求3到4分钟
关于人生Life isn't about keeping score. It's not about how many friends you have or how accepted you are.Not about if you have plans this weekend or if you're alone.It isn't about who you're dating, who you used to date, how many people you've dated, or if you haven't beem with anyone at all.It isn't about who you have kissed.It's not about sex.It isn't about who your family is or how much money they have Or what kind of car you drive.Or where you are sent to school.It's not about how beautiful or ugly you are.Or what clothes you wear, what shoes you have on, or what kind of music you listen to.It's not about if your hair is blonde, red, black, or brown or if your skin is too light or too dark.Not about what grades you get, how smart you are, how smart everybody else thinks you are, or how smart standardized tests say you are.It's not about representing your whole being on a piece of paper and seeing who will accept the written you.LIFE JUST ISN'TBut, life is about who you love and who you hurt.It's about who you make happy or unhappy purposefully.It's about keeping or betraying trust.It's about friendship, used as a sanctity or a weapon.It's about what you say and what you mean, maybe hurtful, maybe heartening.about starting rumors and contributing to petty gossip.It's about what judgments you pass and why. And who your judgement arespread to.It's about who you've ignored with full control and intention.It's about jealousy, fear, ignorance, and revenge.It's about carrying inner hate and love, letting it grow, and spreading it.But most of all, it's about using your life to touch or poison other people's hearts in such a way that could have never occurred alone.Only you choose the way those hearts are affected, and those choices are what life's all about. 以上是人生的 我爱英语（中英文对照的，这篇不错可以看看：） As everyone knows,English is very important today.It has been used everywhere in the world.It has become the most common language on Internet and for international trade. If we can speak English well,we will have more chance to succeed.Because more and more people have taken notice of it,the number of the people who go to learn English has increased at a high speed. I love English,it gives me a colorful dream.I hope I can travel around the world one day. With my good English, I can make friends with many people from different contries.I can see many places of great intrests.I dream that I can go to London,because it is the birth place of English. I also want to use my good English to introduce our great places to the English spoken people,I hope that they can love our country like us. I know, Rome was not built in a day. I believe that after continuous hard study, one day I can speak English very well.If you want to be loved, you should learn to love and be lovable. So I believe as I love English everyday , it will love me too. I am sure that I will realize my dream one day! Thank you!亲爱的老师，同学们： 我很高兴可以在这个课堂上做一次演讲。
这一次，我想谈谈英语。
我的话题是我爱英语。
正如每个人所知，英语在今天十分重要。
它已经被应用到世界的各个角落。
它已经成为商业上最为通用的一门语言并广泛的用于国际贸易。
如果我们能说好英语，我们就有更多的机会成功。
因为越来越多的人注意到这一点，学英语的人数正在已很高的速度增长。
我爱英语，它给了我一个色彩斑斓的梦。
我希望有朝一日我可以畅游世界，用我流利的英语，我可以和世界各地的人交友。
我能看到许多的名胜。
我希望我能够到伦敦去，因为那里是英语的故乡。
我也希望用我流利的英语来将我们的名胜介绍给说英语的朋友，我希望他们可以像我们一样的爱我们的国家。
我知道，罗马不是一天筑成的。
（成功需要日积月累。
）我相信在持续不断的努力学习下，总有一天我可以拥有一口流利的英语。
如果你想被爱，你就应该学着去爱他人。
所以我相信我对英语的爱定将换来它对我的爱。
我相信总有一天我会实现我的梦
谢谢
关于环保：Protecting the Environment Environmental problems are becoming more and more serious all over the world. For example, cars have made the air unhealthy for people to breathe and poisonous gas is given off by factories. Trees on the hills have been cut down and waste water is being poured continuously into rivers. Furthermore, wherever we go today, we can find rubbish carelessly disposed. Pollution is, in fact, threatening our existence. The earth is our home and we have the duty to take care of it for ourselves and for our later generations. Fortunately, more and more people have realized these problems. Measures have been taken to cope with these problems by the government. Laws have been passed to stop pollution. I hope the problem will be solved in the near future and our home will become better and better. 全世界的环境问题变得越来越严重。
例如汽车污染的空气影响了人们的呼吸，工厂释放污染的气体，山上的树木被砍伐，污水不断被排人河里。
另外，无论我们走到哪里，到处可见随意丢弃的垃圾。
事实上，污染正威胁我们的生存。
地球是我们的家园，我们有责任为我们自己和我们的后代去照顾好它。
庆幸的是，愈来愈多的人们已经意识到这些问题。
政府已经采取了很多措施去解决这些问题，法律已被通过以制止污染。
我希望这些问题在不远的将来能得到解决，我们的家园变得越来越好。
关于校园生活Through four seasons of a year,the scene of my campus is more beautiful than what I can describe. With the advent of spring,a sense of renewal accompanied by the blossom of winter jasmine and lilac.Grass can't wait to come out of the ground to join in the chorus of Spring.When summer comes,cockscomb,balsamine and their like make a band to play summer symphony. Then autumn tiptoes in without any notice.chrysanthemum keeps in mum as if it is mourning for the fallen leaves.While I reckon that my campus in Autumn bears a distinct charm. I've never lost my appetite to savor it. Although my campus is not as broad as other schools,I like it! I just love it! Because there are so many good friends I've known for all of my life.Believe it or not,the Campus gave me a dramatic change,from a shy,aloof person to a popular one,like a charm. I love my campus with heart and soul!She is the cradle of my life! 致楼主：有的没有中文解释，可以到Google翻译查看。
不管选哪个主题，最要的是你能把这些做到流利，脱口而出，发音标准，想这种演讲稿，他的内容不是最重要的。
我们都有这样的感觉，别人都说完了我们还不是很了解他说了什么只是知道一些大概的意思，只言片语。
但是仍然得到了很多人的掌声，原因就是他做到了脱口而出，发音标准，声情并茂。
所以建议楼主先找准主题，再多多练习背诵。
3分钟英语演讲，关于环境污染的,求助高手
环境（Environment）Like all other living beings, humans have clearly changed their environment, but they have done so generally on a grander scale than have other species. Some of these changes-such as the destruction of the world's tropical rain forests to create grazing land for cattle or the drying up of almost three-quarters of the Aral Sea, once the world's fourth-largest freshwater lake, for irrigation purposes-have led to altered climate patterns, which in turn have changed the distribution of species of animals and plants.Scientists are working to understand the long-term consequences that human actions have on ecosystems, while environmentalists-professionals in various fields, as well as concerned citizens in the United States and other countries-are struggling to lessen the impact of human activity on the natural world.Population Growth（人口增长）Human population growth may be seen to be at the root of virtually all of the world's environmental problems. Increasingly large numbers of people are being added to the world every year. As the number of people increases, more pollution is generated, more habitats are destroyed, and more natural resources are used up. Even if new technological advances were able to cut in half the environmental impact that each person had, as soon as the world's population size doubled, the earth would be no better off than before.The Population Division of the United Nations predicts that the 5.63 billion humans alive in 1994 will increase to 6.23 billion in the year 2000, 8.47 billion in 2025, and 10.02 billion in 2050. The UN's estimate assumes that population will peak and stabilize at 11.6 billion in 2200.Although it is true that rates of population increase are now much slower in the developed world than in the developing world, it would be a mistake to assume that the population growth problem is primarily a problem of developing countries. In fact, because larger amounts of resources per person are used in the developed nations, each citizen from the developed world has a much greater environmental impact than does a citizen from a developing country.Evidence now exists suggesting that the most important factors necessary to lower population growth rates in the developing world are democracy and social justice. Studies show that population growth rates have fallen in areas where several social conditions have been met. In these areas, literacy rates have increased, and women are given economic status equal to that of men and thus are able to hold jobs and own property; also, birth control information is more widely available, and women are free to make their own reproductive decisions.Global Warming（全球变暖）Like the glass panes in a greenhouse, certain gases in the earth's atmosphere permit the sun's radiation to heat the earth but retard the escape into space of the infrared energy radiated back out by the earth. This process is referred to as the greenhouse effect. These gases, primarily carbon dioxide, methane, nitrous oxide, and water vapor, insulate the earth's surface, helping to maintain warm temperatures. If the concentration of these gases were higher, more heat would be trapped within the atmosphere, and worldwide temperatures would rise.Within the last century, the amount of carbon dioxide in the atmosphere has increased dramatically, largely because of the practice of burning fossil fuels-coal and petroleum and its derivatives. Atmospheric scientists have now concluded that at least half of that increase can be attributed to human activity, and they have predicted that unless dramatic action is taken, temperature will continue to rise by between 1° and 3.5° C over the next century. The consequences of such a modest increase in temperature may well be devastating. Sea levels will rise, completely inundating a number of low-lying island nations and flooding many coastal cities such as New York and Miami. Many plant and animal species will probably be driven into extinction, agricultural regions will be disrupted, and the frequency of severe hurricanes and droughts is likely to increase.Depletion of the ozone layer（臭氧层变薄）The ozone layer, a thin band in the stratosphere （a layer in the upper atmosphere）, serves to shield the earth from the sun's harmful ultraviolet rays. In the 1970s, scientists discovered that the layer was being attacked by chlorofluorocarbons （CFCs）, chemicals used in refrigeration, air-conditioning systems, cleaning solvents, and aerosol sprays.The consequences of the depletion of the ozone layer are dramatic. Increased ultraviolet radiation will lead to a growing number of skin cancers and cataracts and also reduce the ability of people's immune systems to respond to infection. Additionally, the growth rates of the world's oceanic plankton, the base of most marine food chains, will be negatively affected, perhaps leading to increased atmospheric carbon dioxide and thus to global warming.Predicting the rate of ozone depletion is difficult. Optimists claim that if international agreements for the phasing out of ozone-depleting chemicals agreed to in Montréal in 1987 are followed, ozone loss will peak in the year 2000. With many of the world's fastest growing countries in the process of industrializing and modernizing, there is reason to believe that destruction will continue to increase well beyond that year.Air pollution（空气污染）A significant portion of industry and transportation is based on the burning of fossil fuels, such as gasoline. As these fuels are burned, chemicals and particulate matter are released into the atmosphere. These chemicals interact with one another and with ultraviolet radiation in sunlight in various dangerous ways. Smog, usually found in urban areas with large numbers of automobiles, can cause serious health problems. Acid rain is a serious global problem because few species are capable of surviving in the face of such acidic conditions. Acid rain has made numerous lakes so acidic that they no longer support fish populations. Acid rain is also thought to be responsible for the decline of many forest ecosystems worldwide.Water pollution（水污染）Estimates suggest that nearly 1.5 billion people lack safe drinking water and that at least 5 million deaths per year can be attributed to waterborne diseases. Water pollution may come from point or nonpoint sources. Point sources discharge pollutants at specific locations-from, for example, factories, sewage treatment plants, or oil tankers. The technology exists for point sources of pollution to be monitored and regulated, although political factors may complicate matters. Nonpoint sources-runoff water containing pesticides and fertilizers from acres of agricultural land, for example-are much more difficult to control. Pollution arising from nonpoint sources accounts for a majority of the contaminants in streams and lakes.With almost 80 percent of the planet covered by oceans, people have long acted as if those bodies of water could serve as a limitless dumping ground for wastes. Raw sewage, garbage, and oil spills have begun to overwhelm the diluting capabilities of the oceans, and most coastal waters are now polluted. Beaches around the world are closed regularly, often because of high amounts of bacteria from sewage disposal, and marine wildlife is beginning to suffer.Groundwater pollution（地下水污染）Water that seeps through porous rocks and is stored beneath the ground is called groundwater. Although groundwater is a renewable resource, reserves are replenished relatively slowly. When groundwater is depleted in coastal regions, oceanic salt water commonly intrudes into freshwater supplies. Saltwater intrusion is threatening the drinking water of many areas along the Gulf and Atlantic coasts.The EPA has estimated that, on average, 25 percent of usable groundwater is contaminated, although in some areas as much as 75 percent is contaminated. Contamination arises from leaking underground storage tanks, poorly designed industrial waste ponds, and seepage from the deep-well injection of hazardous wastes into underground geologic formations. Because groundwater is recharged and flows so slowly, once polluted it will remain contaminated for extended periods.Habitat Destruction and Species Extinction（居住环境破坏与物种灭绝）It is difficult to estimate the rate at which humans are driving species extinct because scientists believe that only a small percentage of the earth's species have been described. What is clear is that species are dying out at an unprecedented rate; minimum estimates are at least 4000 species per year, although some scientists believe the number may be as high as 50,000 per year. The leading cause of extinction is habitat destruction, particularly of the world's richest ecosystems-tropical rain forests and coral reefs. At the current rate at which the world's rain forests are being cut down, they may completely disappear by the year 2030. If growing population size puts even more pressure on these habitats, they might well be destroyed sooner.This loss is critical from several perspectives. The economic value of species lost and of natural products and drugs that never will be discovered or produced is incalculable. Similarly, it is impossible to place either a moral or an aesthetic value on our growing list of extinct species. As habitats are destroyed and species lost, the world is increasingly losing threads from the interconnected fabric of life.Chemical Risks（化学成分污染）Pesticide residues on crops and mercury in fish are examples of toxic substances that may be encountered in daily life. Many industrially produced chemicals may cause cancer, birth defects, genetic mutations, or death. Although a growing list of chemicals has been found to pose serious health risks to humans, the vast majority of substances have never been fully tested.Environmental Racism（环境歧视）Studies have shown that not all individuals are equally exposed to pollution. Three of the five largest commercial hazardous waste landfills in America are in predominantly black or Hispanic neighborhoods, and three out of every five black and Hispanic Americans live in the vicinity of an uncontrolled toxic waste site. The fact that the wealth of a community is not nearly as good a predictor of hazardous-waste locations as is the ethnic background of the residents reinforces the conclusion that racism is involved in the selection of sites for hazardous-waste disposal.Environmental racism takes international forms as well. Dangerous chemicals banned in the United States often continue to be produced and shipped to developing countries. Additionally, the developed world has shipped large amounts of toxic waste to developing countries for less-than-safe disposal.Energy Production（能源问题）The world cannot continue to rely on the burning of fossil fuels for much of its industrial production and transportation. Fossil fuels are in limited supply; in addition, when burned they contribute to global warming, air pollution, and acid rain.Nuclear energy as an alternative is opposed by many because of the massive devastation an accident can cause. The accident at the Chernobyl' nuclear power plant in 1986 scattered radioactive contamination over a large part of Europe. Approximately 135,000 people were evacuated, and human health has been dramatically affected. The World Health Organization released a report in late 1995 attributing the explosive increase in childhood thyroid cancer in Belarus, Ukraine, and Russia directly to the accident.One reasonable solution is to combine conservation strategies with the increased use of solar energy. The price of solar energy relative to traditional fuels has been dropping steadily, and if environmental concerns were factored into the cost, solar power would already be significantly cheaper. Although it is desirable to have a wider range of energy options, other alternative sources of power （such as wind, geothermal, or hydroelectric） are not likely to provide large-scale solutions in the forseeable future.ConclusionGlobal environmental collapse is not inevitable. But the developed world must work with the developing world to ensure that new industrialized economies do not add to the world's environmental problems. Politicians must think of sustainable development rather than economic expansion. 帮你找了一些资料，仅供参考。
急~
英语演讲稿范文（3分钟内）
火星上的生活 1.我们的行星地球正变得越来越拥挤，越来越受污染；我们可望重新开始，在火星上建立一个更好的家园； 2.首先，交通应当好得多；很快，航天飞机的速度将达到光速的一半； 3.人类要生存，就需要食物.水和空气；科学家希望使植物发展，能在火星上种植，以产生我们需要的食物和氧气；但是，还不能确定它们是否能产生水； 4。
火星上的重力只相当于地球上的3\\\/8，人们在火星上得穿上特制的靴子，以增加重量。
Our own planet,Earth,is becoming more and more crowded and polluted.Hopefully,we can start again and build a better world on Mars.First of all,transport should be much better.In a very short time,space shuttles will travel at half speed of light.Humans meed food,water and air to survive.Scientists hope to plants that can grow on Mars.These plants will produce the food and oxygen that we need.However,it is not certain if these plants will be able to produce water .The gravity on Mars is only about three-eights of the gravity on Earth.Humans on Mars would have to wear special boots to make themselves heavir. 希望采纳，(*^__^*) 嘻嘻
3分钟高中生英语演讲稿
金钱能买来幸福吗-Can Money Buy Happiness? Can Money Buy Happiness? Can money buy happiness? Different people have different opinions. Some think yes, while others hold the opposite. It is true that with enough money one can buy all the things one wants, and live a life of comfort and security. However, it is equally true that lack of money causes great distress. It is a common view that money is the root of all evil. The pursuit of money drives many people to cheat and steal. In some places there is nothing that cannot be bought with money, resulting in corrupt societies where everybody is miserable. So, money does not necessarily mean happiness. It all depends on how it is used. If we make honest and sensible use of money, it can be a stepping-stone to happiness l Although money cannot buy happiness, it can make happiness possible if it is employed sensibly. 金钱能买来幸福吗? 金钱能买来幸福吗?不同的人有不同的回答。
有的人认为能，有的人则持相反的意见。
诚然一个人如果有足够的钱可以买到他想要的所有物品，过上舒适稳定的生活。
然而，同样缺钱往往引起巨大的忧伤。
人们常常认为“金钱是万恶之源”，对金钱的追求驱使许多人去骗去偷。
在某些地方，没有钱买不到的东西，导致社会的腐化堕落。
所以，金钱并不一定就意味着幸福。
这取决于怎样使用金钱，如果我们诚信明智地使用金钱，它将是幸福的基石。
尽管金钱买不到幸福，但它可以使幸福成为可能。
吸烟与健康-Smoking And Health Smoking And Health Today smoking is a widespread habit ali over the world. Not only the old, the youth, but also middle school students have been engaged in smoking. Many of them think that smoking is a smart symbol. However, smoking is harmful to one’s ,health. It contributes a lot of lung cancer, from which many people have died in the past years. It can also cause many other diseases. In a word, if you smoke, you do have a much greater chance of losing your health. Furthermore, scientific research shows that smoking is not only harmful to smokers themselves, but also a threat to public health, especially to women and children. Therefore, many countries have made laws forbidding smokers to smoke m public places such as cinemas, stations, hospitals, and so on Giveup smoking! If you don’t smoke, don’t start. Give upsmoking for the sake of your health, for the sake of your family, and for the sake of the whole world. 吸烟与健康 现在，吸烟是一个世界范围的习惯，不仅老年人、青年人吸烟，就连中学生也加入到这个行列中来，他们中的许多人认为吸烟是一种潇洒的象征。
然而，吸烟对人的健康是有害的，它会引起肺癌，在刚刚过去的几年中；许多人因此而丧命，还可能引发其他的疾病。
总之，如果你吸烟的话，你就很可能失去拥有健康的机会，更进一步说，科学研究显示，吸烟不仅危害吸烟者本人，而且对公共健康来说，也是一个凶兆，尤其是对妇女和孩子。
因此，许多国家都制定了不准在公共场合吸烟的法规，例如：电影院，车站，医院等地。
戒烟吧，如果你还未染上，请不要开始；戒烟吧，为了你的健康，为了你的家庭的健康，为了整个世界的健康。
环境与发展-Development and the Environment Development and the Environment It is undeniable that the worsening environment has become the biggest concern of the present-day world. Land resources are dwindling because of water loss and soil erosion. Waste gases poison the air we breathe. The rivers and lakes are polluted by waste dumped in them from factories. It is probably no exaggeration to say that deterioration of the quality of the environment threatens the existence of mankind itself. Some people are of the opinion that the environmental problem is the price we have to pay for economic development. But I do not think that this argument is valid. After all, what is the point of economic growth if people’s lives are adversely alfected by worsening environmental pollution? There is plenty of evidence to show that sustainable development can be achieved by balancing economic growth with protection of the environment. The key to achieving this is to make people aware of the seriousness of the problem. Both governments and ordinary citizens should join hands to make this world a better place to live in, not only for ourselves, but also for future generations. 环境与发展 不可否认的是环境恶化已成为当今世界上人们最担心的事了。
因为水资源的浪费和土壤被侵蚀，土地资源逐渐缩小。
我们呼吸着有毒的空气，河流和湖泊也被附近的工厂里排放出来的废弃物严重污染了。
不夸大其词地说，环境质量的恶化很可能威胁人类的生存。
有些人说环境问题是我们为经济发展所付出的代价。
对此，我不敢苟同。
如果人类的生活被日益恶化的环境污染所影响的话，那么，经济发展的意义何在? 足够的证据表明：经济发展与环境保护的平衡可以实现可持续发展。
关键是使人们意识到问题的严重性。
政府和普通市民两方都应该携手使地球成为更适合人类居住的地方，这不仅是为我们自己，也是为我们的后代。
这些比较经典，而且符合现实…… 希望能够给你带来帮助
