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学校环境问题英语作文合集2篇 作文怎么写(汇集20篇)

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环境污染例子英语作文

全文共 1220 字

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Write a passage with the words and phrases given:the problem of pollution, cause, artificial substances, release, waste products, industrial production, consumption of goods, bring it under control, agriculture, chemical substancea. Environmental Pollution I read a piece of news recently. It says that in Japan marly businessmen ave selling fresh air to customers.and now it is becoming more and more popular. Why? ——Fresh air is getting less and less in Japan, and so is it in the U. S. A. In fact, environmental pollution is a very serious problem the whole world is facing. it is mainly caused by the waste products released from artificial substances, industrial production and increased consumption of goods. Bedsides, the use of chemical substances in agriculture also causes environmental pollution. Look at the sky, you can see that dense smoke is being released from the high and big chimneys;

those dirty and poisonous substances are flowing into the rivers that we use for drinking water and millions of tons f waste products are heaping around us. How to change this condition? More and more countries are trying to work out some effective means to bring it under control, but no great success has been made.

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篇1:学校周边环境作文350字

全文共 391 字

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学校,是我们学习的地方,它也发生了巨大的变化。

以前,学校的操场全部都是土地,一下雨,操场上就非常泥泞,学生们去厕所回来就会弄得满脚都是泥;教室里学生们做的都是两人一张的长桌子,坐的都是长板凳,桌子上坑坑洼洼的,写字也写不好,板凳两条脚根本不齐,坐上去歪歪扭扭的,根本做不好,更没有图书室、实验室了。

再看一看现在,操场上都是水泥地;学生们统一用的都是单人单椅,桌子上非常光滑;以前没有课外活动,现在又增加了课外活动,让学生们既可以快乐学习,又可以锻炼身体,真是劳逸结合啊!学校还有图书室、多媒体教室,里面还有很多各种各样的器材,这让我们对事物更加了解,学得也就比原来更好了!

图书室里的书多达7000多本,让小学生们尽情地去阅读自己喜欢的书,我最喜欢看格林童话了,因为它们可以告诉我们做人的道理。多读书还可以提高自己的写作能力,所以,我常常徜徉在书的海洋里,体验主角的经历、痛苦和欢乐。

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篇2:新学校新环境

全文共 493 字

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度过了长达两个月之久的充实的暑假,我们迎来了新的学期。在新的学期里,我们将要学习新知识,认识新同学,熟悉新的环境……而我,也将和我一起生活了四年的胜山镇中心小学告别了,将在浒山的阳光实验学校学习与生活。

在与胜山镇中心小学告别后,我迈着轻盈的步伐,怀着激动的的心情向阳光实验学校出发。在我迈进新学校大门的那一瞬间,我就感觉从一个世界进入了另一个世界,在这里,我将开始我新的生活。在上楼时,发现每一根柱子上都有字、画。一根柱子就像一位老师。这些“老师”每一个都亭亭玉立,时刻激励着这个学校的学生前进。

不一会儿,我就进入了505班中,看着坐在椅子上的一张张陌生的面孔,我此时此刻的心情十分激动:这些就是我的新同学,也是将要和我一起玩耍,一起学习的好伙伴。当我坐在指定的位置上时,站在讲台上那个和蔼可亲的女老师吸引了我的眼球,她就是我们的班主任——赵老师。赵老师和其他各科老师将在这之后教给我们许多知识,用他们那辛勤的汗水来哺育我们这些祖国的花朵。

新学校,新的环境,虽然我是从胜山镇中心小学转过去的,但是,我会更加用功,更加努力,使自己尽快融入到505班这个集体,使自己尽快适应这里的生活环境。

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篇3:校园环境卫生英语

全文共 412 字

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I love my school so much, because of the beautiful environment. The first day I walk into the school, I am very impressed by the green trees and the colorful flowers. It seems that I just walk into a park and getlost in the green world. The trees and flowers make me feel so comfortable, and my heart feel the peace.

我非常喜欢我的学校,因为环境很优美。我走进学校的第一天,校园里绿色的树和五颜六色的花就给我留下了非常深刻的印象。就好像我走进了一个公园,迷失在绿色的世界里。树和花让我感到很舒服,心情也很平和。

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篇4:保护海洋环境英语作文

全文共 690 字

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The ocean and we are a whole, first of all, the ocean itself has great handling of pollutants, dilution, diffusion, oxidation, reduction and degradation of purification ability. But the capacity is not unlimited, when toxic and harmful substances accepted by the local waters more than its own self-purification ability, it will cause pollution of the waters. In addition the ocean while contains many resources, but the regeneration of marine resources is the need of time, if the development of marine resources we uncontrolled and not pay attention to the protection of these resources, so there is always used in the light of day. So the protection of the marine is extremely important.

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篇5:环境问题的全球性

全文共 223 字

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环境问题不仅是某个国家或某个区域的问题,目前已经发展成全球性的问题了。一个地区发生环境问题,影响的范围往往会大大超过该地区。例如,酸雨随着大气的运动,能影响到很远的地区;国际性河流上游被污染,将使河流全流域遭受影响……环境污染问题日益严重,废气、废水甚至固体废弃物都可以从一国转移到另一国。有些环境问题甚至影响着全人类的生存与发展。例如,亚马孙河流域热带雨林的破坏,会对全球的气候产生影响;大气中CO2浓度的升高和臭氧层的破坏,更是威胁着全人类。

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篇6:英语环境保护作文结尾

全文共 1600 字

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关于英语环境保护作文结尾要如何写呢?下面是小编整理的英语环境保护作文结尾事例,希望能给大家带来帮助。

文章结尾的作用是概括全文内容,进一步强调或肯定文章的中心思想,使文章意义表达得更加深刻。

文章结尾的形式也是多种多样的,常见的有以下几种:

1、首尾呼应,画龙点睛

在文章的结尾,把含义较深的话放在末尾,以点明主题,深化主题,起到画龙点睛的效果。如“I Cannot Forget Her” (我忘不了她)的结尾:

After her death, I felt as if something were missing in my life. I was sad over her passing away, but I knew she would not have had any regrets at having given her life for the benefit of the people.

2、重复主题句

结尾回到文章开头阐明的中心思想或主题句上,达到强调的效果。如“I Love My Home Town”(我爱家乡)的结尾:

I love my home town, and I love its people. They too have changed. They are going all out to do more for the good of our motherland.

3、自然结尾

随着文章的结束,文章自然而然地结尾。如“Fishing”(钓鱼)的结尾:

I caught as many as twenty fish in two hours, but my brother caught many more. Tired from fishing, we lay down on the river bank, bathing in the sun. We returned home very late.

4、含蓄性的结尾

用比喻或含蓄的手法不直接点明作者的看法,而是让读者自己去领会和思考。如“A Day of Harvesting”(收割的日子)的结尾:

Evening came before we realized it. We put down our sickles and looked at each other. Our clothes were wet with sweat, but on every face there was a smile.

5、用反问结尾

虽然形式是问句,但意义却是肯定的,并具有特别的强调作用,引起读者深思。如“Should We Learn to Do Housework?”(我们要不要学做家务?) 的结尾。

Everyone should learn to do housework. Don’t you agree, boys and girls?

6、指明方向,激励读者

结尾表示对将来的展望,或期待读者投入行动。如“Let’s Go in for Sports”(让我们参加体育运动)的结尾:

As we have said above, sports can be of great value. They not only make people live happily but also help people to learn virtues and do their work bettter. A sound mind is in a sound body. Let’s go in for sports.

文章的结尾没有一定的模式,可以根据表达主题的需要灵活创造。一般的习惯是,一些记叙文和描写文经常采用自然结尾的方法;但说理性和逻辑性较强的说明文和议论文则往往都有结束语,以便使文章首尾呼应,结构完整。

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篇7:改善环境的英语作文

全文共 416 字

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There are many ways to improve our environment.

First,control the number of vehicles.More vehicles,more air pollution.

Second,plant more trees to clean the air and improve the land.

Third,control the use of the electricity and power to bring down the production of carbon.

Fourth,people should eat more vegetables and less meat to keep low carbon.

Last but not least,protect the animals to keep the balance of the nature.

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篇8:小学二年级英语作文:我的学校

全文共 1963 字

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I love my campus, the beautiful campus.

In school, teaching building eight golden characters on the wall are greeted, "harmonious, bold and unrestrained, exploration, innovation", this is the school motto of our school.

Right, foot on the way with the stones of cobblestone, unknowingly came to the gallery. Corridors, greeted the vine climb to the top of gallery to for students to keep out the sun. The class was over, the students all like to play here. The park has a small bamboo forest, spring, small bamboo forests of bamboo shoots crowds of his head.

Go further to the right, it is the playground of school. Have children in the rope skipping, running on the playground... there are a large camphor tree, spring, pulled out big camphor tree buds, summer big camphor tree is like a big green umbrella, to shade the students. In winter, at school, large camphor tree was covered with snow, like a big white hat. Big camphor tree is very charming all the year round, the classmates all like to go there to play, after gym class. Big camphor tree is like a kindly grandfather, to meet us to school every day, has watched the us to leave.

Campus, in the most distinctive is the teaching building of the hall, walked into the hall, the most noteworthy is that hung on the hall on top of the "west", "west" with photo is miyoshi students, the teacher I hope we can spread your wings and fly like a bird.

A circle around the school, you should be familiar with my campus is a bit, then please come to my school to watch!

我爱我的校园,这个美丽的校园。

走进校门,教学楼墙上的八个金光闪闪的大字映入眼帘,“和谐、奔放、探究、创新”,这是我们学校的校训。

向右走,脚踩在用一颗颗鹅卵石铺成的石子路上,不知不觉来到了长廊。长廊里,密密麻麻的藤攀上了廊顶,为同学们遮挡太阳。下课了,同学们都喜欢到这里玩。公园里有一片小竹林,春天到了,小竹林里的笋成群的探出头来。

再往右走,便是学校的操场。有小朋友在跳绳、跑步······操场上还有一棵大樟树,春天,大樟树抽出来新芽,夏天大樟树像一把绿色的大伞,为同学们遮阳。冬天,下学了,大樟树上盖满了雪,就像一顶巨大的白帽子。大樟树一年四季都非常迷人,同学们上完体育课时都喜欢去那儿玩耍、嬉戏。大樟树就像一位慈祥的老爷爷,每天迎接我们上学,有目送着我们离开。

校园里,最有特色的要数教学楼里的大厅了,走进大厅,最引人注意的是那挂在厅顶上的“西子鸟”,“西子鸟”上贴的都是三好学生的照片,老师希望我们能像小鸟一样展翅飞翔。

绕了学校一圈,你应该对我的校园有点熟悉了吧,那么就请来我的学校细细观赏吧!

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篇9:中考英语作文预测:周围的环境

全文共 1216 字

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目前南通市正在积极创建全国文明城市,中学生也在为之努力。假如你是你是某中学的一名学生张通,请根据下列图表所示内容,给笔友John写一封电子邮件,介绍有关情况。

注意:1.邮件内容应包含所有要点,不要简单翻译,可适当发挥;

2.文中不得使用真实姓名、校名等信息;

3.词数90左右(邮件中已经写好了的部分,不计入总词数)。

4.参考词汇:civilized 文明的 respect 尊敬

Dear John,

Im glad to hear from you. Now let me tell you something about our city. Nantong is trying to set up a national civilized city. We middle school students are also doing something for it.

Zhang Tong

参考答案:

Dear John,

Im glad to hear from you. Now let me tell you something about our city. Nantong is trying to set up a national civilized city. We middle school students are also doing some things for it. We are all polite to our teachers. (In class, we listen careful to them./When we meet them, we always say hello to them./…)We also respect the old. For example, we help them cross the streets.

We are always ready to help each other.(When one has difficulty with his studies, others will help him at once./...)We often show our love to those in trouble. Last month, the students of my class donated money to the earthquake-hit areas.

Besides, we plant trees to protect the environment and make our city more beautiful.

Nantong is my hometown. I will do my best to turn Nantong into a civilized city.

Zhang Tong

[中考英语作文预测:周围的环境

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篇10:形势与政策论文:城市水环境的问题探讨

全文共 3055 字

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我国的城市河流和湖泊污染情况是非常严重的,城市河流有不同程度的富营养化问题。以下是小编给大家整理的形势政策论文:城市水环境的问题探讨的内容,欢迎大家查看。

摘要: 随着经济快速发展,城市生态形势压力也与日俱增,水环境问题已成为制约社会发展的大问题,环保基础设施建设严重落后,城市生活污染物未得到有效控制,工业污染源未得到严格治理,农业污染日益突出,部分河段水质受污染严重,河水发黑发臭,完全失去水质功能。本文主要对城市水环境治理及污染防治对策进行了分析探讨。

关键词:城市规划;水环境质量;污染防治;对策

城市生态环境是城市宜居水平评价和城市经济发展的重要因素。作为城市生态环境的重要组成部分,城市水环境对生态环境的治理和改善有着重要的影响。受传统经济发展理念的影响,我国城市水环境污染情况不容乐观。而且在城市扩建过程中还造成了大量周边湿地的消失,造成了城市生态环境、水环境的进一步恶化。针对这样的情况,我国近年来加大了城市生态环境治理力度。从城市规划与发展的角度出发,恢复城市周边湿地环境、改善城市水环境与生态环境。

一、城市水环境的基本特点

1、城市用水的特点

生活用水和生产用水是城市用水的主要类型,由于城市人员密集、工业化生产程度高,所以,城市用水需要较高的质量、较大的供水量、稳定的供给,这对城市采水、供水和用水来说有着不同于农村的特点。

2、城市用水的依赖性强

城市由于用水量大、供水要求高,所以,单纯依靠城市区域的供给和开采往往难于满足城市发展的需要,因此,大众城市往往需要从城区周边或外地调水来满足城市的用水需要,“引滦入津”、“南水北调”就是这样的举措。

3、城市水环境脆弱

在我国北方,城市生活和生产用水大都在简单处理或未经处理就直接排放到环境之中,在日积月累的大量污染的影响下,城市水环境受到了严重破坏,并且这一现象有蔓延和恶化的趋势,造成水环境的脆弱和生态的破坏,影响城市深入地发展。

4、城市地下水环境恶化

城市地下水环境恶化来源有两个,一是,城市生产和生活中大量污染源渗入地下,造成对地下水资源和水环境的破坏;二是,城市地表硬化导致城市地面下渗量的减少,在大量开采地下水的同时,没有必要的补充,出现水环境的恶化。

二、城市水环境综合治理方法

1、以人为本,科学发展

把维护广大人民群众的根本利益作为第一点,把群众最关心、最直接和现实的水环境保护问题为重点,转变发展观念,重视生态文明建设,加快建设资源节约和环境友好社会,走科学发展道路。

2、优先保护饮用水源

合格的安全饮用水源是人民生活的必需品,水环境治理应突出重点,优先保护饮用水源,确保群众饮水安全。

3、强化节能减排、效益原则

与区县减排工作挂钩,把COD削减量考核指标纳入到区县水环境治理目标体系中,明确各区县污水处理率、污水处理厂运行负荷率等量化指标。切实保障三个达标,即污水处理率必须达标、污水处理厂的运行负荷率必须达标、COD的减排必须达标。合理安排资金,对节能减排效果明显,有一定经济基础,技术条件成熟,符合国家和行业产业政策的项目优先考虑。

4、治本方针

突出截污治污。河道沿线村镇、企业密集,污染来源复杂。为此,河道治理将坚持“先截污、后清淤、先治理、后换水”的原则,周密排查河道沿线污染来源,大力实施清淤、截污、生态护坡、河岸绿化等措施,加强河道水体自净和生态修复功能;在突出截污治理的同时,各区县还将坚持污水处理厂、配套管网同步建设,大力提升现有污水处理厂运行负荷率,妥善解决污水出路,切实提高河道水环境质量。

5、加强协作,落实责任

市水务局于去年成立了河道水环境考核办公室,将清水工程已治理河道纳入考核范围,各区县按照属地管理原则在本辖区内建立水环境管理机构和相关管理机制,有效巩固水环境治理成果。此外,目前市政府已正式批准本市河道水环境实施“河长制”管理意见,即将公布全市主要河道“河长”名单,构建完善的河道水环境管理长效机制,为今后本市水环境由加强治理向强化管理转变打好基础。

三、城市河流水防治和改善技术的应用

1、底泥疏浚和河床微生态系统修复

在河流洪水、蓄洪功能上,底泥疏浚主要体现在河流利用水面变化增加行洪、蓄洪能力。作为沉积物沉积,有的湖泊水的深度可以被调整,从而减少其调节和存储功能。增加城市河湖疏浚河道水容量后,以确保顺利排出这些河流洪水,保障人民群众的生命和财产安全,也避免了洪涝灾害。底泥疏浚是水环境综合整治的一项重要措施,滇池、巢湖、太湖等水环境综合整治已被广泛使用。可见,合理的疏浚清除污染物,对于生态系统的恢复和重建具有非常重要的作用。

2、人工增氧技术

人工增氧技术是基于城市河流水污染后缺氧的现象,人工的向水体中注入空气或氧气,从而加速水体复氧的进程,提高水体的溶解氧水平,恢复和提高在水中好氧微生物的活力,使河流水的污染物净化,从而改善河流的水质。河流氧气一般使用固定和移动站充氧平台两种形式。河道人工增氧技术的应用,能够使得水质不同时期达到消除黑臭、减少水体污染负荷、促进河流生态系统恢复的目的。

3、调水引流水质改善技术

贯穿城市的内河河网水系,因为控制结构的限制,使得河流水不能够连接到外部的水体,造成水处于静止的状态,当天气炎热的时候,溶解在水中的氧气浓度就会降低,容易导致水质变坏。通过改进水域水动力条件,提高水体污染物的稀释能力,增强局部水体的自净能力,许多城市在水资源利用和部署中,通过跨流域调水工程,解决空间分布不均的问题。

4、植物修复技术

对于河道河流自然恢复应采取生态化措施,主要是通过恢复河岸植被、恢复天然湿地,在河岸种植芦苇、浮萍、睡莲、水生植物和其他湿地植物,以提高水体的净化能力。种植水生植物的城市河流水,一方面能够通过植物的根系的吸收,从而降低和遏制富营养化趋势;另一方面通过种植水生植物,可以也起到美化水体环境,提高城市的景观的效果。

5、生物净化技术

生物净化技术是充分利用天然水体自净的功能,采用人工措施,创造更有利的环境有利于微生物的生长和繁殖,并培养出大量的微生物从而增强水体净化能力,以提高纳污水体氧化降解有机物能力的一种净化方法。目前国内外最常用的生物净化技术是曝气技术、生物膜技术与投菌技术。生物净化技术,其成本低,对环境的影响小,能够有效降解污染物,是水体污染处理的最佳选择之一。生物净化技术及产品的开发,特别是分解菌株的培养也将被筛选到河流水污染控制技术之中,是未来城市水污染防治和治理的发展趋势。将具有特殊分解能力的菌种添加到河边,能够将水体中有毒有害物质分解为无毒无害的物质,从而加速有毒物质的分解、转化,不仅可以提高河流的净化能力,而且也实现了河流的生态修复。生物产品的运用将成为人工增氧、底泥疏浚等现有防治技术的有益补充。

四、结束语

综上所述,我国的城市河流和湖泊污染情况是非常严重的,城市河流水有不同程度的富营养化问题。目前,在城市河流污染环境下,需要完善城市管线网络,并建设污水处理厂,具体的水污染防治技术措施有:底泥疏浚、人工增加氧气、引水排水水质改善、植物修复、湿地水净化技术等河流强化净化技术。能够应对不同的城市的污水状况,使得城市河流水污染的情况得到了有效的控制,促进城市河流的健康发展。

参考文献

[1]曹洲榕,禹华谦.城市水环境问题及对策探讨[J].四川建筑.2011(01)

[2]高婷,于航宇.浅析我国水环境现状及城市污水的处理[J].中国新技术新产品.2011(16)

[3]陈邵鹏,顾海东.立足流域浅谈城市水环境规划建设[J].中国科技信息.2012(03)

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篇11:环境保护英语作文120字

全文共 510 字

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保护我们的环境地球是我们的家园,我们必须照顾好它我们应该使减少污染,如我们所知大家在北美的垃圾进行1000公斤。大多数都是包装大部分垃圾变成土而不是塑料制品,塑料保持多年来它会污染我们的环境,所以我们不应该浪费我们应当做些事情回收利用。

Protect our enviorment The earth is our home,we must take care of it.We shoule make a less pollution as we know everybody in north America makes 1000 kilograms of the garbage everyday. Most of it is packaging Most of garbage turns into soil but not to plastic,plastic keeps for many years it will pollute our environment so we shouldn’t waste thing we should make some things for recycling .

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篇12:环境变化英语作文

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Environmental problems are becoming more and more serious all over the orld. 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 do n and aste ater is being poured continuously into rivers.Furthermore, herever e go today, e can find rubbish carelessly disposed. Pollution is, in fact, threatening our existence.

The earth is our home and e 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 ith these problems by the government. La s have been passed to stop pollution. I hope the problem ill be solved in the near future and our home ill become better and better.

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篇13:食品安全问题令人堪忧英语作文

全文共 794 字

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As we all known,food safety problems are more and more popular in our country,because

more cases about food safety problem have appeared.

Firstly,As the old saying goes,the food is what matters to the people.Food plays an important role in peoples life.So food safety influences peoples health and life.Secondly,some producers only think about earning money without thinking about ensuring food safty.they produce unqualified food.Thirdly,some food supervisory departpents dont perform their duty completely.This behavior make some producer ignore the safety of production.

If we want to solve problems that is illustrated former,we must call on the supervisory department to manage the food market.And the producers must paly their roles.Lastly,we hope that there is law that punish illegal acts.

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篇14:关于怎么解决大学学费问题的英语作文

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It is a fact that college is becoming more and more expensive and college life is becoming especially hard for the students who were born in needy families. However, there are several ways in which these students can cover their tuition that their parents are not able to afford. Finding a part-time job, for example, is an ideal way. Besides, one can ask the bank for a loan and repay it when he has the ability. Finally, one can seek assistance from the society.

For me, earning tuition by doing part-time jobs is the most suitable way. First, I learn to be independent both mentally and economically in this way. Apart from this, I no longer need to wor-ry my parents with so heavy a burden. Finally, since I earn my own living, I will be more confi-dent with myself and, therefore, I can live a busy but meaningful college life.

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篇15:环境问题

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当前,威胁人类生存的十大环境问题是:

(一)全球气候变暖

由于人口的增加和人类生产活动的规模越来越大,向大气释放的二氧化碳(CO2)、甲烷(CH4)、一氧化二氮(N2O)、氯氟碳化合物(CFC)、四氯化碳(CCl4)、一氧化碳(CO)等温室气体不断增加,导致大气的组成发生变化。大气质量受到影响,气候有逐渐变暖的趋势。由于全球气候变暖,将会对全球产生各种不同的影响,较高的温度可使极地冰川融化,海平面每10年将升高6厘米,因而将使一些海岸地区被淹没。全球变暖也可能影响到降雨和大气环流的变化,使气候反常,易造成旱涝灾害,这些都可能导致生态系统发生变化和破坏,全球气候变化将对人类生活产生一系列重大影响。

(二)臭氧层的耗损与破坏

在离地球表面10~50千米的大气平流层中集中了地球上90%的臭氧气体,在离地面25千米处臭氧浓度最大,形成了厚度约为3毫米的臭氧集中层,称为臭氧层。它能吸收太阳的紫外线,以保护地球上的生命免遭过量紫外线的伤害,并将能量贮存在上层大气,起到调节气候的作用。但臭氧层是一个很脆弱的大气层,如果进入一些破坏臭氧的气体,它们就会和臭氧发生化学作用,臭氧层就会遭到破坏。臭氧层被破坏,将使地面受到紫外线辐射的强度增加,给地球上的生命带来很大的危害。研究表明,紫外线辐射能破坏生物蛋白质和基因物质脱氧核糖核酸,造成细胞死亡;使人类皮肤癌发病率增高;伤害眼睛,导致白内障而使眼睛失明;抑制植物如大豆、瓜类、蔬菜等的生长,并穿透10米深的水层,杀死浮游生物和微生物,从而危及水中生物的食物链和自由氧的来源,影响生态平衡和水体的自净能力。

(三)生物多样性减少

《生物多样性公约》指出,生物多样性“是指所有来源的形形色色的生物体,这些来源包括陆地、海洋和其他水生生态系统及其所构成的生态综合体;它包括物种内部、物种之间和生态系统的多样性。”在漫长的生物进化过程中会产生一些新的物种,同时,随着生态环境条件的变化,也会使一些物种消失。所以说,生物多样性是在不断变化的。近百年来,由于人口的急剧增加和人类对资源的不合理开发,加之环境污染等原因,地球上的各种生物及其生态系统受到了极大的冲击,生物多样性也受到了很大的损害。有关学者估计,世界上每年至少有5万种生物物种灭绝,平均每天灭绝的物种达140个,估计到21世纪初,全世界野生生物的损失可达其总数的15%~30%。在中国,由于人口增长和经济发展的压力,对生物资源的不合理利用和破坏,生物多样性所遭受的损失也非常严重,大约已有200个物种已经灭绝;估计约有5000种植物在近年内已处于濒危状态,这些约占中国高等植物总数的20%;大约还有398种脊椎动物也处在濒危状态,约占中国脊椎动物总数的7.7%左右。因此,保护和拯救生物多样性以及这些生物赖以生存的生活条件,同样是摆在我们面前的重要任务。

(四)酸雨蔓延

酸雨是指大气降水中酸碱度(PH值)低于5.6的雨、雪或其他形式的降水。这是大气污染的一种表现。 酸雨对人类环境的影响是多方面的。酸雨降落到河流、湖泊中,会妨碍水中鱼、虾的成长,以致鱼虾减少或绝迹;酸雨还导致土壤酸化,破坏土壤的营养,使土壤贫瘠化,危害植物的生长,造成作物减产,危害森林的生长。此外,酸雨还腐蚀建筑材料,有关资料说明,近十几年来,酸雨地区的一些古迹特别是石刻、石雕或铜塑像的损坏超过以往百年以上,甚至千年以上。世界目前已有三大酸雨区。我国华南酸雨区是唯一尚未治理的。

(五)森林锐减

在今天的地球上,我们的绿色屏障——森林正以平均每年4000平方公里的速度消失。森林的减少使其涵养水源的功能受到破坏,造成了物种的减少和水土流失,对二氧化碳的吸收减少进而又加剧了温室效应。

(六)土地荒漠化

全球陆地面积占60%,其中沙漠和沙漠化面积29%。每年有600万公顷的土地变成沙漠。经济损失每年423亿美元。全球共有干旱、半干旱土地50亿公顷,其中33亿遭到荒漠化威胁。致使每年有600万公顷的农田、900万公顷的牧区失去生产力。人类文明的摇篮底格里斯河、幼发拉底河流域,已由沃土变成荒漠。中国的黄河流域,水土流失亦十分严重。

(七)大气污染

大气污染的主要因子为悬浮颗粒物、一氧化碳、臭氧、二氧化碳、氮氧化物、铅等。大气污染导致每年有30-70万人因烟尘污染提前死亡,2500万的儿童患慢性喉炎,400-700万的农村妇女儿童受害。

(八)水污染

水是我们日常最需要,也上接触最多的物质之一,然而就是水如今也成了危险品。

(九)海洋污染

人类活动使近海区的氮和磷增加50%-200%;过量营养物导致沿海藻类大量生长;波罗的海、北海、黑海、东中国海(东海)等出现赤潮。海洋污染导致赤潮频繁发生,破坏了红树林、珊瑚礁、海草,使近海鱼虾锐减,渔业损失惨重。

(十)危险性废物越境转移

危险性废物是指除放射性废物以外,具有化学活性或毒性、爆炸性、腐蚀性和其他对人类生存环境存在有害特性的废物。美国在资源保护与回收法中规定,所谓危险废物是指一种固体废物和几种固体的混合物,因其数量和浓度较高,可能造成或导致人类死亡,或引起严重的难以治愈疾病或致残的废物。

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篇16:美化校园环境英语作文

全文共 677 字

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Id like to tell you that our school has worked out a new program.

The purposes of the program are to make our school more beautiful, to make the air cleaner and fresher, and to turn our school into a better place for us to study and live in.

According to the program, we will plant different kinds of trees, flowers and grass in and around our school. A botanical garden will be built for us to visit and practice in. Besides, we are to build a small garden in which we can do some reading and take a rest. Whats more, some statues of famous people will be set up to encourage us to work harder. Dont you think it a wonderful program?

Welcome to our school if you have any chance.

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篇17:英语校园生活问题作文

全文共 730 字

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the lucky-number has become increasingly popular in daily life of mordern socialty. for example, the number eight means big money which people like most, while the number four means death.

some people believe lucky numbers so deeply that they will afford a telephone with numbers without four and others which is bad in their mind. they argue that the lucky-number really can bring good luck, and, at least, no evidence testify they can not.

as far as i am concerned, there is no such relationship betwwen the numbers and lucky, for the reason that numbers theirself are given certain meaning for the purpose of application of mathmetic. and, in addition, man should not depend on lucky which, in their mind, the numbers gives them.

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篇18:关于学校环境的建议书

全文共 382 字

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大家好!在我们的日常生活的环境中,终能看见随意丢弃的塑料袋落在地上。它们随风飘扬着,洒落在每一个地方。即污染环境,又不美观。而且这些塑料袋还很难处理。用火烧冒出的黑烟污染了空气。埋在土里,即使过300年也不烂,严重破坏了土地的质量。那么这些塑料袋是从哪里来的?原来是人们带来的。人们上集市买菜时买一样东西就随手拿一个塑料袋。用完了就随地丢掉。还有一些是人们吃用塑料袋装的食物,吃完了就随地乱扔,造成了环境严重的污染,为了使这些塑料袋消失,我有一些建议:

一,保证自己不乱扔塑料袋,从自己做起。

二,宣传乱扔塑料袋带来的危害,劝人们不要乱扔塑料袋。

三,让自己的亲人买菜用竹篮子,那样即环保又卫生。而大多数塑料袋只能用一次,而竹篮子洗洗又可重复使用。

减少污染,节约资源是我们每个公民的责任和义务。从自己做起,要让人们知道:污染环境千夫指,保护环境万夫颂。让我们行动起来吧。

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篇19:保护环境的英语作文

全文共 736 字

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Protect Environment

Today there is more and more pollution and the environment is becoming worse and worse. So we have to know how to protect the environment. Here are some ways.

First, we can stop driving our personal cars. We can go to school or work on foot or by bus. Not only can it protect environment, but also it is good for our health.

Second, we are not supposed to drop litter anywhere, we should put them into the trash bin. And it’s best to pick up the litter on the ground when we see them.

Third, we should save the paper, the water, the food and so on.

Fourth, we should protect the trees and we should plant more trees.

I think if everyone does something to protect the environment, our world will be much better.

[保护环境英语作文4篇

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篇20:保护环境的英语小作文

全文共 468 字

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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。

[保护环境英语小作文

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