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环境问题的英语作文【汇集20篇】

导语:除夕,又称大年夜、除夜、岁除、大晦日,是农历一年最后一天的晚上,即春节前一天晚。下面是yjbs作文网小编为您收集整理的英语作文,希望对您有所帮助。

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有关规则英语作文高中

全文共 1467 字

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Nowadays, some discussions about the childrens education and management

have raised the whole social concern. It seems not only about childrens

personal development, but also about the whole countrys future.

There are two main views in debate, which of them is that children should

obey the rules set by parents and teachers. The other is that less control will

help children to deal with their future adult life.

As for the former, the advantages of it seem to be very apparent, which of

them is that children can make a distinction between right and wrong things. And

they will have a sense of principle and responsibility. Of course, the

disadvantages are also very clear. Firstly, children will be lacking in

imagination and creation. Secondly, they cannot make up their mind on their

own.

Concerning the latter, the view seems to be reasonable because in this ways

these children are more clever and active to create something special. However,

the drawbacks couldnt be ignored as a result of a problem that children cannot

get a clear understanding of their lifetime.

Combining the both points, as far as Im concerned, parents and teachers

are supposed to instruct children to obey the primary principle when they do

some deeds. Moreover, children need more freedom to realize their dreams. Only

in this way can the problem be solved perfectly.

In conclusion, we cant only support one side simply. On the contrary, we

ought to choose different measures to educate children flexibly.

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更多相似作文

篇1:英语保护环境

全文共 595 字

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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 anything to it . This has caused 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 (from)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.

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篇2:未来的水资源问题英语作文

全文共 1576 字

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Presently, the world is faced with serious water problems. But these problems witt become more intense and more complex in the future. Our increasing population witt tremendously increase urban waters, primarily sewage. On the other hand, increasing demands for water witt decrease substantially the amount of water available for diluting wastes. Rapidly expanding industries which involve more and more complex chemical processes will produce large volumes of liquid wastes. Many of thesewitt contain chemicals that are poisonous. To feed our rapidly expanding population, agriculture will have to be intensified. This will involve ever increasing quantities of agriculture chemicals. From this, it is apparent that drastic steps must be taken immediately to develop corrective measures for the pollution problems.

There are two ways by which these pollution problems can be lessened. The first relates to the treatment of wastes to decrease their pollution hazard. This involves the processing of solid wastes "prior to" disposal and the treatment of liquid wastes to permit the reuse to the water or best reduce pollution upon final disposal. The second approach is to develop an economic use for all or part of the wastes. Farm manure is spread in fields as a nutrient. Wastes from sewage disposal plants are used in some areas both for irrigation and for the nutrients contained. Liquid wastes from other processing plants may also be used as a supplemental source of water. Only by doing these promptly now can we expect to solve the serious water problems in the future.

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篇3:人口问题英语作文300字

全文共 1769 字

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[考查要点]

考生应根据提示信息(中/英文)写出一篇150-200词的短文。提示信息的形式有主题句、写作提纲、规定情景、图、表等。写作时间约为35分钟。

人口快速增长带来的问题(图表作文强化练习)

[题目要求]

Directions: Study the following graphs carefully and write an essay in at least 150 words. Your essay should cover these points;

1. effect of the country’s growing human population in its wildlife

2. possible reasons for the effect

3. your suggestion for wildlife protection (15 points)

【参考范文】 the ups and downs of population growth

As is seen from the two graphs, it is clear that with the rapid growth of U.S. population from 1800 to 1990, the number of its wildlife species no longer existing soared during the same period. Naturally, we can draw the conclusion that the sharp decline of wildlife species resulted from the population growth.

Two reasons may account for this phenomenon. To begin with, as the population grows, people consume much more natural resources, which often leads to excessive hunting. Second, with the increase of human activities, modern people take up more and more space. Which has a great impact on other species. Finally, the problem of pollution becomes more and more serious with the development of modern industry. More and more animals have to adapt themselves to the decaying environment or move to a totally different place, but not all of them are fortunate enough to survive the changes.

Solving this problem calls for, above all, the government’s efforts to control population growth, to decrease industrial pollution and to enhance the laws to forbid wildlife hunting. Moreover, common citizens should be aware of this ecological crisis and take on the responsibility of wildlife protection. In a word, only when the government and the common people make joint e f forts can we hope to find a satisfactory solution to this problem

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篇4:关于环境保护的英语作文

全文共 1187 字

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, hello! I am an alien from mercury. This time, I wrote to you for the environment on earth.

Ago, I went to visit the earth, the earths beautiful scenery let me fascinated. The river clear visible bottom, can see the fish swimming around, can see the bottom of the river green brown stone. A stream of bright blue, let me deeply respected. Come to the garden, and flowers there. Came to the forest, where birds, the animals free life. Lush trees... Returning to mercury, I told my friends everything I saw on earth, ready to go to earth for a few years with my friends.

A few years later, I came to earth with the guys. At this time, we cant believe the scene appeared in front of us: once lush trees has been changed to dongdong tall buildings. The previous clear visible bottom stream and stream of bright blue, has disappeared, has become a stinking creek, before swimming fish have been stinks, have a lot of rubbish in the river. Looked up and saw the sky is gray, it is already lost before the beautiful beautiful blue skirt. Road piled up a lot of rubbish, everyone passing by, and no one to clean up the trash.

I want you to take care of the environment and protect the environment.

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篇5:个人保护环境英语作文

全文共 684 字

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Do something to protect the environment.We want to hold a green Olympic Games ,so everyone should do something useful to protect the environment ,whether it is big or small.

We should do something to stop people from doing bad things to the environment .We should put rubbish into dustbins instead of throwing it about. Everyone must care for flowers ,grass and tress in public .We shound collect things like paper ,plastic bags our neighborhood as well ,it’s necessary to plant more trees every year .

It is everyone’s duty to make our neighborhood much better with our hands minds .Let’s make a contribution to protecting the environment and the Plympic Games successfully.

[个人保护环境英语作文

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篇6:关于地震的英语

全文共 612 字

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Yesterday afternoon, when I was sitting in the classroom and listening to

the teacher. Suddenly, the screen seemed moving and it started to shake. My

teacher stopped his class and then he asked us to calm down. He let the students

who were close to the door left first, and then the rest of us ran out of the

classroom one by one. After a while, everything seemed to be normal, the teacher

asked us to go back to the classroom. Later I learned that there indeed came the

earthquake. I admired our teacher so much, in the important moment, he did not

run away, but considered us in the first place. He is a good teacher.

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篇7:保护环境作文高中600字

全文共 688 字

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藏羚羊飞奔在寒冷的雪山,猎鹰飞过那碧绿的天空,爬山虎一点点的攀上墙角。鸟儿清脆的鸣叫,小溪潺潺的流动,风轻轻掠过美丽的花朵,人们伸开双臂,呼吸着享受着大自然的美妙与奇幻……“啊”的一声一切美好的事物都消失了,取而代之的是融化的冰川,没有家园的动物,条条黑色的河道,被污染的的空气,植物渐渐的枯萎,森林夷为平地……

在现今,由于人们无穷无尽地开采资源,大自然遭到了严重的破坏。为了拯救奄奄一息的地球,世界各地都纷纷号召人们保护环境、珍惜资源。

当你在姹紫嫣红的花丛里时,当你在缓缓流淌向远方的河流边时,当你站在碧绿无垠的草原上,微风亲吻着你的脸颊,耳畔回荡起婉转的鸟叫声,人往往是在失去后才懂得珍惜,懂得美好。

树木是地球的肺,自然是地球的面貌。只是今天有人突然大梦初醒,发现不管是水资源流失还是冰川融化都威胁到了人类的生存,但他们自私自利,依然无止境浪费。但他们号召他人时,美名其曰:“保护地球”。

保护环境已经不是一个新的话题了,我们应该从小事做起,从自己做起,保护地球人人有责。拒绝使用一次性筷子,节约用水节约用电,以及不乱扔垃圾,这都是最基本的。可又有几个人是真正在乎保护环境的融化的冰川上,可怜的北极熊在漂泊,污染的水里,鱼儿在痛苦的呻吟,砍倒的树木下有多少动物的家。

也许多年后,城市会被一场大水给淹没世界上最后的一个人也会沉寂在黑暗的水中,也许多年后世界会是一片沙漠,最后一滴水会是最后一个人类的泪水,也许多年后人类依旧繁华,但我想他们应该忘记了一个名为地球的星球。

保护环境不是自私自利,不是关爱人类自己,而是一场战争,一场报答养育我们的地球母亲的战争。

保护环境,人人有责。

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篇8:关于环境保护问题的英语作文

全文共 926 字

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假如你是新华中学的学生,名叫MIKE。去年6月1日,我国已经禁止使用塑料袋,你对此有何看法和什么好的建议?

I’m Mike. I am a student in Huaxing Middle School. Do you know the plastic bags? Do you often use the plastic bags? I don’t like them. I think they use the wasting valuable oil their production. And they can’t decompose(分解) in a short time. The plastic bags will make our world worse. I agree with the rule, which people can’t get the free plastic bags in the shops, supermarkets. It encourages people to use their cloth bags and baskets. It’s good for our environment.

So I hope all the students in our class stop to use the plastic bags, and use our own cloth bags. I hope we can take care of our environment.

Let’s make our world more and more beautiful.

我是迈克。我是新华中学的学生。你知道塑料袋吗?你经常用塑料袋吗?我不喜欢他们。我想他们用的是浪费宝贵的石油生产。他们不能分解(分解)在很短的时间。塑料袋会使我们的世界变得更糟。我同意这一规定,在商店、超市里,人们无法得到免费的塑料袋。它鼓励人们用自己的布袋和篮子。这对我们的环境有好处。

所以我希望我们班的所有同学都停止使用塑料袋,并用自己的布袋。我希望我们能照顾我们的环境。

让我们让我们的世界变得越来越美丽。

[关于环境保护问题英语作文

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篇9:2024关于环保问题的英语作文

全文共 932 字

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假定你叫张华,最近从报纸上得知美国某公司将在你的家乡建一座工厂,请给该公司写封电子邮件。要点如下:

1.表示欢迎:有利于家乡发展等;

2.感到担忧:造成环境污染等;

3.希望了解有关环保措施及更多信息。

注意:1.词数80-100;

2.请不要逐句翻译,可适当发挥,以使行文连贯;

3.邮件的开头和结尾已为你写好,不计入总词数。

dear sir or madam:

Im a middle school student.

_______________________________________________________________________.

Im looking forward to hearing form you.

Yours faithfully

Zhang Hua

范文:

Dear sir or madam:

Im a middle school student. I have recently leamed from the newspaper that you are going to build a factory here in my hometown. There is no doubt that it is good for development of my hometown and it will provide us with more jobs. most of us stand by the program. however,some of us are worried that the factory will make much noise and pollute the environment of the area. I would like to know whether you have any plans for the environment protection. Would you please offer us more information about it?

Im looking forward to hearing form you.

Yours faithfully

Zhang Hua

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篇10:关于健康问题的中考英语作文

全文共 1216 字

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卫生健康饮食:健康一直是人们关注的问题我校要举行以“关爱健康”为题的主题班会,请根据下表内容谈谈你的看法,写一篇80字左右的演讲槁。 (1)保持健康的重要性;(2)保持健康的方法;(3)保持健康的结论;(4)你的看法。 (1)How tokeep healthy /fit?

All of us want to be healthy. First,we should get enough sleep during the night. We can go to bed early and get up early. Staying up late is bad for our health. Second,we must have the right kinds of food. We should eat more fruit and vegetables and less meat. We should drink a lot of water. We should have healthy eating habits. Third,we should do more exercise to build up our bodies. Finally,we should be happy everyday. Because smile will make us younger。

That is my advice.I hope you are healthy and enjoy your life。 (2)How to keep healthy /fit?

Here is my advice about how to keep healthy/fit. As a middle shool student. first youd better do more exercise such as playing ball games ,running, swimming and jumping ropes(绳子)。Then you should pay attention to your diet or meals. Dont eat too much meat or suger,but more vegetables and fruit.Third you need enough sleep or rest . Next keep yourself happy.As people often say smiling makes younger.Last you mustnt drink wine or smoke .They are bad for your health. That is my advice.I hope you are healthy and enjoy your life。

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篇11:高考英语作文范文

全文共 852 字

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请根据以下提示,并结合具体事例,用英语写一篇短文。

Small things make a big difference。 The small things we do can make us a responsible member of the society。

注意:①无须写标题;

②除诗歌外,文体不限;

③资料务必结合你生活中的具体事例;

④文中不得透露个人姓名和学校名称;

⑤词数不少于120,如引用提示语则不计入总词数。

范文:

It isn’t hard to grow up into a responsible member of society。

I can well remember an incident that happened on a rainy Sunday afternoon。 I was on my way to the bookstore and was waiting for the green light at a crossing when a girl of about ten was knocked down by a passing car, which drove off quickly。 A man immediately rushed to the girl to give her first aid and I joined in without hesitation。 Luckily she was not badly injured and we sent her to the nearest hospital。 Compared with the escaped driver, I am proud of what I did。

As a member of the society, I am aware that being responsible is what it takes to make a better society。

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篇12:环境和谐生活英语作文

全文共 3854 字

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When it comes to harmony, you might think that this is an abstract, general concept. Its hard to see what it really is. Maybe if you read the following, it will be clear what harmony is.

It may be a definition of nature. Indeed, the weak creatures must be the belly of powerful creatures. But the ring of the ring is also a natural harmony. When a large number of frogs die, there will be a plague of locusts and food. As a result, food prices have skyrocketed and financial crises are inevitable.

A remote road in the United States, called maltin, is clogged with vehicles. The reason is to make way for the snake. Originally, the construction of this road, destroyed the "channel" of snakes. In that year, there were not only frequent incidents of snake wounding, but also in the north of Fulton, there was a crop failure, and the rats were overrun. The reason was that there were too few snakes!

The Yellow River, our mother river, the silt accumulation, this is also the result of the harmony that the Chinese people break. In the upper reaches of the Yellow River, the water is clear and transparent. But as she flows through the loess plateau, piles of sediment flow into the water, making her muddy. The loess plateau was a green place hundreds of years ago. It is because of human logging that soil erosion and silting are deposited in the Yellow River.

See, isnt this an example of a typical human being who destroys his own harmony with nature and leads to his own detriment?

But have you thought about it? Why do humans destroy the food chain? Undermine your harmony with nature? Why would humans be so desperate for natural safety?

For one thing, many people dont know enough about the food chain. Dont really understand what the food chain is! Second, and most important, human beings have endless desires. Some people, to satisfy the desire of money, killed the elephant, saw the tusks with saws, saw the ivory to buy the crafts, and got a lot of money. Of course, there are also people who pay a lot of money to buy mink, leopard skin, tiger fur coats. Because of this, there will be many people to kill and sell, like those lovely and good animals to death. Others are just to vent their anger and abuse the petite little creatures that have no resistance to human beings. Of course, there are also people for entertainment, for their own sake, and go hunting. So many cases, in fact, is mans endless desire.

But the development of mankind is precisely because human beings have endless desires. People have invented elevators, cars, trains and planes because they are too lazy to walk. Someone has invented a massage chair, air conditioner, etc. The war that led to the rapid progress of mankind is also rooted in the desire to be bullied by powerful, desirable countries. Thus, the development, creation, the establishment of its own international status. Therefore, no desire, no progress, development.

Destruction is inevitable as you develop to satisfy your desires. But if, at the same time, it also protects nature, afforesting and releasing animals, then this is a virtuous cycle. As the workers of the great hinggan mountains said, "we cut down trees, we also have trees, one hand and one hand." We should also protect our own nature.

Nature is like a very tight equation, like a long iron chain. It is always a ring and a ring. The incompleteness of the equation will affect the problem and lead to the deviation of the result. Once the chain is rusted, it disconnects, loses its ability to function, and causes significant losses at critical moments. Therefore, we humans should not deliberately destroy the harmony of nature, while destroying it, our human interests actually suffer a great loss. We need to protect nature and establish a harmonious relationship with nature.

You must have been able to understand the real harmony here.

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篇13:环境保护英语

全文共 1370 字

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近年来我国多地雾霾天气不断增多,极大地影响了人们的健康与生活。作为环境保护的一个近期热点话题,雾霾天气符合高考考试要求,也能唤起高中生环保意识。

假如你是李华,你的英国笔友Bill来信询问你家乡是否有雾霾天气,情况如何。请按下面写一封电子邮件:

1.感谢他得关心;

2.介绍情况:(1)去年以来以发生数次雾霾天气(2)人们已认识到雾霾天气的危害,正采取各种举措减少其发生(3)你自己为此做了什么或打算做什么

要求100词

【参考范文】

Dear Bill,

I’m glad to receive your letter,thank you for your caring for the weather and my health.Now I’d like to tell you something about the smog.

Since the winter last year,the smog has occurred a lot of times.it has done great harm to our daily life.many traffic accidents happened just because of the heavy smog weather,more and more people have to go to see the doctor because the serious disease caused by the smog,quite a lot of flights have to be put off,a great number of people have to stay at home for fear of the poisonous air caused by the smog.

People have realized the great harm caused by the smog and the importance of protecting the environment.people all over the country are taking measures to reduce the smog weather.the government suggests people go to work or school with the public traffic, such as the bus and the underground.Also we should plant more trees.

According to me, I will go to school by bike or on foot, and I won’t throw the waste anywhere.in addition, I will tell the people I meet to protect the environment as possible as they can.would you like to tell me some good ideas?i’m looking forward to your reply.

Yours,

Li Hua

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篇14:保护环境英语作文高一80词

全文共 1340 字

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Once man did not have to think about the protection of his environment。

There were few people on the earth, and natural resources seemed to be

unlimited。

Today things are different。 The world has bee too crowded。 We are using up

our natural resources,and polluting our environment with dangerous chemicals。 If

we continue to do this, human life on earth will not survive。

We realize that if too many fish are taken from the sea, there will soon be

none left。 Yet,with modern fishing methods, more and more fish are caught。We

know that if too many trees are cut down, forests will disappear。 Yet, we

continue to use powerful machines to cut down more and more trees。 We see that

if rivers are polluted with waste products, we will die。 Yet, waste products

are

still put into rivers。

We know that if the population continues to rise at the present rate, in a

few years, there wont be enough food。What can we do to solve these

problems?

If we eat more vegetables and less meat, there will be more food available。

Land for crops feeds five times more people than land where animals are

kept。

Our natural resources will last longer if we learn to recycie them。

The world population will not rise so quickly if people use modern methods

of birth control。

Finally, if we educate people to think about the problems we shall have a

better and cleaner planet in the future。

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篇15:关于游泳的英语作文高5

全文共 1297 字

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China had cause for a double celebration on Saturday after winning their

first ever swimming gold medal as well as setting a new world record in the

womens 400m medley.

Sun Yang sealed a place in Chinas Olympic history with an impressive swim

in the 400m freestyle final that was only 0.07 seconds off the world record to

take gold.

Defending Olympic champion Park Ta-Hwan was leading at the final turn, but

the 20-year-old Sun surged past his South Korean rival in the final length to

seal a place in Chinese Olympic history.

"The feeling is very nice, its beautiful. Its a big dream come true for

me," said Sun.

"Because its the Olympic Games, I felt a little bit nervous at the start,

and then at the end, I felt that I could get a medal."

Twenty minutes after Yang won Chinas maiden gold medal, 16-year-old Ye

Shiwen triumphed in the womens 400m medley, as well as breaking the world

record set in Beijing four years ago.

Ye rounded off a sparkling day in the pool for China as she claimed the

title with a breathtaking final lap of 28.93 seconds.

"I thought at the 200 meters that the race was lost, but then I realized I

was in the top two or three and I was confident I could win on the last leg,"

said Ye.

"I dreamed of winning the gold medal, but I never ever expected to break a

world record, Im overwhelmed."

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篇16:环境污染现象英语

全文共 1568 字

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industrial pollution is the industrial production process of the formation of gas, waste water and solid emissions on the environment pollution. industrial pollution is mainly concentrated in a few industries. paper, chemical, steel, electricity, food, mining, textile and other seven sectors accounted for the total wastewater discharge 4 / 5. paper and food industry accounts for cod emissions of cod emissions 2 / 3, non-ferrous metallurgical industry, heavy metal emissions of heavy metals emissions account for nearly 1 / 2. industrial pollution is the industrial enterprises in the production process, including human biological survival and reproduction of the natural environment against. pollution is mainly from the production of the "three wastes" (waste water, waste gas, waste) and all kinds of noise caused can be divided into water pollution, air pollution, waste pollution, noise pollution.

industrial pollution hazard. first, a large number of industrial production in the discharge of untreated water, gas, slag and other hazardous waste, it will seriously damage the ecological balance of agriculture and natural resources on the development of agricultural production caused great harm; second, industrial "three wastes" of the industry production itself is also very serious hazards, toxic pollutants can corrode pipes, damaged equipment, affecting plant life, etc.; third, environmental pollution, rampant pollution, directly endangering the health of the masses; also some contamination is not easy to find, after the damage that has very serious

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篇17:母亲节话题高中生英语

全文共 1270 字

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Mothr’s Day is a holiday whn childrn honor thir mothrs with cards, gifts and

flowrs. In many countris, such as Dnmark, Finland, Italy, Turky, Australia and

th US, popl clbrat Mothr’s Day on th scond Sunday in May whil many othr countris

of th world clbrat thir own Mothr’s day at diffrnt tims through out th yar.

On of th bst ways to clbrat Mothr’s Day is to giv your mom th day off. Lt hr

rlax with th rst of th family doing all th houswork. Usually, dad and th kids

will lt mom slp lat that morning as thy go into th kitchn to prpar hr favourit

brakfast. Nvr forgt to plac a vas with a singl flowr on th tabl bsid th food. Th

kids can pick up th flowr from th gardn or buy on from th shop. Arrang vrything

nicly bfor mom waks up. Som familis will carry th food and mom’s favourit

sctions from th nwspapr to hr bdroom so that mom can hav brakfast in bd. Prsnts

and cards from th kids can b handd to mom by thmslvs or just placd on th dining

tabl.

Aftr brakfast, go anywhr mom liks to go. Shopping, swimming or going on a

picnic in th gardn. Mak a spcial Mothr’s Day dinnr or tak mom out for a grat mal

in a famous rstaurant sh lovs most.

Anyway ,lt mom njoy th whol day and fl your lov, and thn th Mothr’s Day can b

a good on. As Mothr’s Day is around th cornr, it’s tim to tak actions!

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篇18:当前,威胁人类生存的十大环境问题是

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(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19:端午节英语

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Today is the Dragon Boat Festival. Its Qu Yuans day of commemoration. In

the morning, I wore a beautiful skirt, I had eaten glutinous rice dumplings, and

I followed my father. Mother went to her grandmothers house together. I see my

brother. My sister is waiting for me at the door.

As soon as I got off the train, they were dragged into the room and played

games. I will be a patient first, my sister will be a doctor and my brother will

be a nurse. At noon, grandma made a full table lunch, we ate lunch, heart. The

aunt said, "if I can eat such a rich dish every day, I will be satisfied."

In the afternoon, when our family went back to grandmas house, my aunt.

Great aunt came. They also sent a lot of things to our kids. We had a good time

today.

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篇20:成长的烦恼高一英语

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Last week, our teacher gave us a task. We needed to interview some people

and collect different opinions. At first, I felt it a difficult task, because I

was such a shy person that I dared not to talk to strangers. In order to finish

the task, I cooperated with my classmates. They helped me to ask people for a

second, then I started to talk with them in a comfortable way. I felt much eased

soon and no longer felt shy. Now I get over my fear and become stronger. This is

the good sign of growing up. I am so thankful to my classmates. Without their

help, I wont go that far.

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