有关空气污染英语作文通用20篇

Pollution is becoming more and more serious all over the world. As is shown in the cartoon, two cars are giving off waste gas and three people are trying to avoid breathing in the poisonous gas by masking their face with their hands. The poisonous gas sent off by factories, domestic appliances and automobiles has made the air unhealthy for people to breathe.

There is no denying that automobiles are indications of civilization, progress and development; nevertheless , automobiles cause the serious problem of air pollution. Scientists have warned that unless effective measures are taken, the problem of pollution will eventually get out of hand. Actually, people are showing a real concern over the problem. For example, there is an increasingly loud voice from the public for firm action against pollution from automobiles.

Indeed, the earth is our home and we have the duty to take care of it for ourselves and for our descendants. In my opinion, we should work out concrete solutions to the problem of pollution from poisonous gas given off by automobiles. For example, the automobiles should be equipped with a device which can dispose of waste gas so as to prevent it from polluting air. Only in this way can we really solve the problem of air pollution caused by automobiles.

污染变得越来越严重的世界各地。这幅漫画所示,两辆车散发废气和三个人正试图避免吸入有毒气体通过屏蔽自己的脸。工厂的有毒气体罚下,家用电器和汽车污染的空气影响了人们的呼吸。

不可否认,汽车文明的迹象,进步和发展;然而,汽车造成空气污染的严重问题。科学家们警告说,除非采取有效措施,污染的问题最终会失控。实际上,人们显示出真正的担忧的问题。例如,有一个公共的越来越大声对汽车污染公司行动。

事实上,地球是我们的家园,我们有责任照顾它为我们自己和我们的后代。在我看来,我们应该制定具体的解决问题的有毒气体污染的汽车。例如,汽车应该配备一个设备可以处理废气,以防止污染空气。只有用这种方法我们才能真正解决由汽车引起的空气污染的问题。

ne possible version:

Dear Mike，

Thank you very much for your concern. Last months several places in Beijing were blanketed with thick yellow fog. Everything around disappeared from oursight. Some highways were closed. Traffic jams were commonly seen in the streets. Many people, especially children and seniors, even found it difficult to breathe. As a result, local hospitals were crowded with people who had problems with their noses and lungs. Part of the cause was the dry weather, but the severely damaged environment contributed a lot to this nightmare. Personally I didn’t get any health problems in the haze because I stayed mostly indoors.But to make a significant change we really have to do more to protect our environment. To live a better life we have to push on with the economy, but it wound be meaningless if we have to achieve it at the cost of our breathing air.

Regards!

Yours，Li Hua

The important of Environmental protection

With the development of economy, peoples life is getting better and better. The increasingly rapid pace of life. However, environmental problems have become increasingly prominent.

Too many people pay attention to their life and work. To reduce the environmental protection consciousness, causes the environmental pollution is becoming more and more serious. The white trash everywhere. Air pollution. The pollution of water. The land pollution. And so on. Nowadays. These have seriously affected peoples lives. The pollution of the environment has led to mass produce all kinds of disease germs. Popular. It seriously affected peoples lives. We all know.The protection of a good living environment and people is cannot do without. Have a good environment. Peoples life can be guaranteed. In order to get the sustainable development of society.

As we all know. The earth is our home. Protect environment depends on everyone. Only when we have a good environment is the guarantee. Our life will be better and better.

Nowadays, a lot of environment has been seriously polluted. Now, look at the polluted environment.

The river

I was walking in the park, smell a smelly fish, the pedestrians on the road also cover your nose in one hand, with his other hand fan with bad smell, I cant stand, hurriedly to speed up the pace, I looked down and turned out to be a lot of dead fish in the river, is this why? I puzzled, and then takes a look, want to come out, must be the river has been polluted, I saw the river there are many junk "gather" talk loud talking and laughing together, so I must be the fish cant stand it, to "rest" in this harsh environment, the main or because people litter, let the water turbidity, polluted, alas! Looking at the already clear water of the river is now dark, the original lively and disorderly fish are also motionless, I have a feeling of not coming out!

air

It is a sunny day, I a person walking in the street, the road cars, buses, motorcycles, the horn is to me a son to chung, car and more up, however, pedestrians less, because the way the air became more pungent, car tail industrial waste gas, contain a variety of toxic substances, in the sunshine, will produce many harmful gases, respiratory tract have a lot of harm to human body, high incidence of respiratory disease. Why do people have bicycles? It is one of the best tools for overcoming heart disease, and cycling can also help prevent high blood pressure, sometimes more than medicine, and can prevent weight gain, hardening of the arteries and keeping the bones in half. And bikes dont emit waste gas and are healthy. Doesnt this kill two birds with one stone? So I urge people not to drive a bike only, for the whole earth more color, one less dirty!

Here, I appeal to everyone to love our home -- earth, we have only one earth, you do not love her how do she love you? So let us work together to make our home more beautiful and rich. And everyone thrifty, polite and hygienic, so that the whole earth will be more beautiful and clean! I believe that after listening to my appeal, we will all act together to make our family more beautiful, wont we?

[英语作文环境污染

北京空气重度污染高达五级

雾霾是近几年来比较常见的空气环境污染现象，它的出现也让人们加大了对空气质量的检测和改善工作的展开。

根据预测，本轮的重污染天气过程从2号开始一直持续到4号夜间，其中，今明两天空气最差，预计将达五级重度污染。2号，北京市发布了空气重污染橙色预警以来，北京市各相关部门分别落实应急措施，并加大了对污染源排放执法检查和应急减排措施督查力度。

为确保应急措施落实到位，环保部门加大对固定污染源、移动污染源排放执法力度，截至目前，共出动执法人员1030余人次，检查施工工地、企业排放等点位1100多个;在一些水泥搅拌站记者看到，相关企业已停工停产，水泥搅拌车成排停放在厂区内并都贴上了封条，同时，按照应急预案的要求，4S店里的喷涂车间也停止了使用。

此外，通过路检、遥测、入户和进京口检测，共检查机动车3.77万辆次，处罚尾气超标车辆50辆，劝返外埠进京超标车88辆。

与此同时，北京市住建部门还开展了应急措施落实专项检查，截至目前，共检查工程942项，其中违规工地101项;城市管理部门已出动清扫保洁作业人员27123人次，作业车辆3689车次，检查人员1026人次，对重点道路加大清扫保洁强度，减少道路扬尘污染。

从目前的整体情况来看，针对本轮空气重污染橙色预警，北京市各区、各相关部门应对响应及时，整体情况良好，但仍存在个别露天焚烧等违规情况，已交相关部门处理。

语文迷网站提醒您：雾霾的组成十分复杂，大小有数百种颗粒物，这些颗粒物通过人体呼吸，进入呼吸道，会引发气管炎、哮喘等呼吸道疾病。特别要提醒有相关疾病的人群，要注意多加防范，减少外出。

In my hometown, the air is polluted seriously. However, in recent years,

the pollution gets from bad to worse, because of the increasing number of

private cars. Especially during the rush hours, too many private vehicles move

slowly on narrow roads, emitting a large amount of waste gas. Moreover, the

poisonous gas sent by the nearby factories is also one of the main causes of

pollution. Therefore, it’s demanded that immediate and effective measures must

be taken to restrict private cars and public transportation must be developed to

the largest extent. Besides, we should use renewable and clean energy

recourses.

Today, as the economy develops fast, people can buy what they need, the

producers provide them all the new things, so the factory produce many products,

in order to make the biggest profit, they don’t deal with the pollution. Water

gets polluted, it does harm to people’s health, we drink water everyday, the

government controls the producers to figure out some ways to deal with the water

pollution.

由于私家车将会有更多的污染。一旦汽车起动,它释放大量的脏气和热量，这会导致很大的污染和温室效应。以下内容是小编为您精心整理的英语作文汽车环境污染，欢迎参考！

英语作文汽车环境污染一

In general, there are two ways of traveling, private cars and public transportation. Chinese people should regard public transportation as their first traveling opinion.

一般来说,有两种旅游方式，私家车和公共交通工具。中国人应该把公共交通工具作为旅游的第一选择。

First, there are so many people living in this countries that make it so crowded. If each chinese people own a car, there will be far more traffic jams and accidents, which increase you impatience.

首先,这个国家住着很多人，使得它非常拥挤。如果每个中国人都拥有一辆私家车，将会有更多的交通堵塞和事故，这会让你变得更加的不耐烦。

Moreover, there will be far more pollution resulted from cars. Once a car started, it release huge amount of dirty gas and heat, which lead to great pollution and result in green house effect.

再者，由于私家车将会有更多的污染。一旦汽车起动,它释放大量的脏气和热量，这会导致很大的污染和温室效应。

All in all,Chinesepeople should take public transpotation into consideration first。

总之，中国人应该以公共交通工具为第一选择。

英语作文汽车环境污染二

Too many cars have caused a lot of serious problems in our world. Besides congestion, accidents and fast fuel consumption, cars are responsible for a good part of air pollution in big cities. One possible solution is to design and develop clean cars and clean fuels. In Shanghai, some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as petrol. Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not buy private cars. Thus, the total number of cars in big cities will reduce greatly. On the whole, the elimination of air pollution needs the collective efforts from the government, the public and the environmentalists.

The drawing portrays a tragic scene in which people are still polluting and leaving about the rubbish. Lots people show bad manners , entirely indifferent to the environment of the world we are living in.

The aim of the painter is assailing the serious environmental problem——pollution, for which several factors are responsible. Population as by far increased, our country is marked by the surpassing growth of economy; living standards are high up. But the environment leaves much to be regretted.

How miserable it is to live in such an environment! Who is to blame for the tragic？ Everybody should be responsible. we must prevent garbage from being thrown away into rivers, ponds, and lakes. With the water pollution going on someday we shall die with no water to drink at all. The scenery spots waiting to be re-beautified. Wild realization of what is our environment responsibility should be awakend. The must be exercises of our authority over the tourists to punish them sternly when they are found defiling our nature. Only in this way may can we cure the problems drastically, and regain perfect environment to live in.

这幅图画描绘了一幅悲惨的景象，人们仍在污染和留下垃圾。许多人表现不好的举止，对我们生活的世界环境漠不关心。

画家的目的犯了严重的环境问题——环境污染，所负责的几个因素。人口比我国的人口增长更为显著，我国的经济增长率明显超过了国民经济的增长，生活水平也很高。但是环境让许多遗憾。

生活在这样的环境中是多么的可悲！谁是谁的悲剧？每个人都应该负责。我们必须防止垃圾被扔进河里，池塘，湖泊。有一天我们会死，没有水喝的水污染。景点等待重新美化。我们的环境责任是什么野生的实现应该唤醒。必须锻炼我们的权力者的严厉惩罚他们，当他们发现玷污我们的本性。只有这样，我们才能彻底治愈这些问题，重新获得理想的生存环境。

[ 环境污染英语作文带翻译

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.

我的家乡——焦作，以前是一个风景如画的地方。

一天，我和妈妈去散步，我看见了一个大x囱，上面冒出了黑烟，像一条大黑龙冲上天空，它们张牙舞爪，顷刻间把蓝蓝的天空覆盖了，天变的灰蒙蒙的，把白云吞噬了，就连太阳也被它吓跑了。

看到这一切，我伤心极了。这些烟雾中，有着大量的烟雾，吸入眼睛里，会导致眼睛发红，发涩，吸入呼吸道里，会发生支气管炎，严重的还会导致死亡。

我们应该少开车，多走路，如果要去的地方很远，那也不要开，做公交车就行了，也要把那些化工厂搬到离城市比较远的地方去，这样子就不会污染环境了，对人类的危害就会少些。

我希望天会更蓝，水会更清，草会更绿，花会更红，相信经过大家的努力，人类的生活会更美好。

Pollution is harmful to human beings. Polluted water causes many kinds of diseases such as diarrhea, enteritis, etc. And sometimes these diseases even take man’s life. Dirty air or air-borne garbage causes stinging eyes and running nose. Pollutants are destructive. They cause runs in nylon stockings and crack rubber tires and they eat away at stone and rust iron.

Measures have been taken to control pollution. In recent years, legislative steps have been introduced to control pollution. Rivers are being cleaned. Air is purified, and pollutants are being trapped before they are poured out of chimneys.

However, pollution problems have not been completely solved. Pesticides are widely used almost everywhere. They pollute soil, water and food. They have the power to make our streams fishless and our gardens and woodlands silent and birdless. Some factories are still using air as a dumping place for wastes. Some lakes are still dirty. Quite a few chimneys are still pouring smoke into air and noise pollution remains serious.

早晨起来，我再也没有看到那火红的太阳来照亮大地。只有走出家门，你才会发现大雾笼罩着整个城市，周围原本美丽的景色也变得模糊不清了。由雾霾引起的交通堵塞现象;由雾霾引起的哮喘等疾病……雾霾天气时刻困扰着我们，给我们带来许多不便。虽然我常常裹着大衣、背着书包从街上匆匆走过，但也会时不时打一个喷嚏，连感冒也久治不愈。

最近一段时间，我们成都的天气总是雾蒙蒙的。就在2013年11月21日，四川省成都市遭遇史上最严重的雾霾。现在，雾霾天气严重地影响成都的空气质量。雾霾天气的空气中，包含了一些尘土行的微小颗粒，这些微小的颗粒是人们用肉眼无法看到的，它们足以使人们得上肺病，对我们的身体造成伤害。现在的成都，雾霾天气几乎每天都有。美丽的“天府之国”也变成了一座“雾霾之都”了。

不要说雾霾是杀手，更不要说雾霾很可怕，其实，真正的凶手是我们人类，是我们不懂得保护环境，才引起的雾霾。要想挽回美丽的“天府之国”，我们可以把坐汽车变为骑自行车;可以少吃炒菜，多吃炖菜;可以戒烟或把吸完的烟头扔到垃圾桶里;可以少放烟花爆竹;还可以多种植花草树木，来净化环境。只有我们选择低碳生活，才能阻止雾霾天气的发生。

啊，让我们立刻行动起来，一起来阻止雾霾天气的发生，挽回我们美丽的“天府之国”——成都吧!

Although the government has announced many criterious, the barbarous behavior can be seen everywhere. Such as throwing litter on the streets arbiitrarily, crossing the road when the red lights on, smoking at the public place and etc.

The Expo 2010 Shanghai China is coming, it is important for us to show a beautiful and clean environment to the world. A tidy enviornment can show the civilization of the city, and leave the foriengers a good impression. Moreover, a comfortable and beautiful city can let the citizens live happier end enjoy the life.

Therefore, the measures should be taken immediately. As a lovely citizen, we should not only obey the rules ourselves but also appeal other people behave theirselves. We can add more litter bins and slogans on the streets, plant more trees and decreas the factorys let-out.

In recent years, we can clearly feel the environment around us is more and moreobvious pollution, environmental safety problems have been very serious. Because of our previous policy is heavy economic development, light environmental protection,resulting in environmental pollution, ecological damage is very serious, mainly manifested in the following aspects:

近几年来，我们可以明显的感觉到我们身边的环境污染愈显明显，环境安全问题已十分严重。因为我国以往的政策方针是重经济发展，轻环境保护，所以造成环境污染、生态破坏十分严重，主要表现为以下几个方面：

In the atmosphere of security, since the middle of the twentieth Century, industry andthe rapid development of transportation, causing air pollution is increasing. Air pollutionis harmful to human health, but also affect the growth of plants and animals,destruction of building materials, serious when can alter the earths climate. According to the survey, China each year from air pollution and economic losses amounted to about 100000000000 yuan.

在大气安全方面，20世纪中叶以来，工业和交通运输迅速发展，造成了大气污染的日益加重。大气污染既危害人体健康，又影响动植物的生长，破坏建筑材料，严重时会改变地球的气候。据调查显示，我国每年因大气污染造成的经济损失高达1000多亿元。

In the water security, water pollution in China is very serious, widespread around thedrinking water safety problems, a direct threat to human and animal survival. In recent years, although the investment fund management a lot of Huaihe and other waters, but the effect is not obvious, the overall situation is still deteriorating.

在水安全方面，我国水污染问题十分严重，各地普遍存在着饮用水安全问题，直接威胁到人畜生存。近几年虽然投入大量的资金治理淮河等水域，但效果并不明显，整体情况仍在恶化。

In a biological safety, the invasion of alien species mass, a serious threat to thebiological diversity of china. In fact, the blind introduction of foreign species, damage the environment balance, serious and even lead to disastrous consequences. At the same time, because of the destruction of the ecological environment and wildlifehunting, biological extinction rate is rapidly increasing.

在生物安全方面，大规模的外来物种入侵，严重威胁了我国的生物多样性。事实证明，盲目引进外来物种，会破坏环境平衡，严重时甚至带来灾难性的后果。同时，由于生态环境的破坏和对野生动植物的滥捕滥猎，生物消亡的速度正在迅速增加。

In the security of land, the land desertification and soil erosion is very serious. In addition, the cultivated land quality in China decreased very rapidly, at the same time,because of the serious land pollution phenomenon caused by excessive use ofpesticides, is directly related to food safety problem of residents in our country. China is a developing country, in the face of environmental pollution pressure not only fromChina itself, and applied pressure from some developed countries abroad. Therefore the development of economy and environment is a need for us to issue long face, and it also need to rely on the participation of each and every one of us.

在土地安全方面，我国土地荒漠化和水土流失的情况已十分严重。另外，我国耕地质量下降非常迅速，同时由于过度使用农药等造成的严重的耕地污染现象，直接关系到我国居民的食品安全问题。 我国是一个发展中大国，面对环境污染方面的压力不仅来自国内本身，还有来自国外一些发达国家施加的压力。因此发展经济和治理环境是一个需要我们长久面对的问题，而这也需要靠我们每个人的共同参与。

导语：现如今我们的生活中有太多的汽车，除了拥挤，事故和快速的燃料消耗，汽车是造成大城市空气污染的主要原因。下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

Too many cars have created a lot of serious problems in our world. Besides congestion, accidents and fast fuel consumption,cars are responsible for a good part of air pollution in big cities. All the time, they are pumping huge amounts of waste gases into the atmosphere. These gases are very harmful, causing disease and even death. Last winter, car fumes formed heavy smog over Beijing, making the sky gloomy for weeks and deteriorating peoples health.

One possible solution is to design and develop clean cars and clean fuels. In Tsinghua University, campus buses are driven by electricity. In Beijing some of the public buses begin to run on natural gas, which does not give off as much carbon dioxide as the petrol. But it may take decades for the new models of clean cars to completely replace the traditional ones.

Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not private cars. And the total number of cars in big cities will reduce greatly.

On the whole, the elimination of air pollution needs the co-efforts from the government, the public and the environments. This problem will be solved only with the help of science and technology.

【参考译文】

太多的汽车在我们的世界里制造了许多严重的问题。除了拥挤，事故和快速的燃料消耗，汽车是造成大城市空气污染的主要原因。他们一直在向大气中排放大量的废气。这些气体是非常有害的，导致疾病甚至死亡。去年冬天，汽车烟雾在北京上空形成了浓重的烟雾，使天空阴沉了数周，恶化了人们的健康状况。

一种可能的解决方案是设计和开发清洁汽车和清洁燃料。在清华大学，校园巴士是由电力驱动的。在北京，一些公共巴士开始使用天然气，这并没有像汽油那样排放二氧化碳。但清洁汽车的新模式可能需要几十年才能完全取代传统汽车。

另一个解决办法是发展现代公共交通系统，限制私家车的使用。如果汽油价格不断上涨，公共交通工具的效率和足够的方便，大多数人不会私家车。大城市的汽车总数将大大减少。

总的来说，消除空气污染需要政府、公众和环境的共同努力。这个问题只有在科学技术的帮助下才能得到解决。

我们生活的地球正遭受着严重的空气污染。工厂排放的废气、燃烧的垃圾、汽车的尾气等都是污染大气的祸源。它们时刻侵袭着我们的呼吸道和肺，使呼吸系统的发病率逐年上升。

The earth on which we live is to suffer from serious air pollution. The exhaust gas from the factory, the burning of waste, car exhaust and other pollution in the atmosphere are the source of trouble. The time of the invasion of the respiratory tract and lung, the incidence of respiratory rate increased year by year.

当空气轻微污染时，人体吸入的空气可以由鼻腔里的鼻毛除去部分灰尘，再由鼻腔里的黏液和各类支气管里的黏液将灰尘粘连住。气管和支气管内的纤毛有几千万根，它们每秒约摆动12次，像“清洁工”一样从下向上推扫呼吸道里的黏液，直至咽喉部，再通过咳嗽咳出体外。

When the air is polluted slightly, inhaled air can be part of the dust removal by nasal cavity in the nose, the nasal mucus in the bronchial mucus and the dust adhesion. Tracheal and bronchial cilia in tens of millions of their root, about 12 times per second to swing, like a "cleaner" from the bottom up sweep mucus in the respiratory tract, and throat, cough up through in vitro.

当空气严重污染时，呼吸道的净化作用将降低，甚至完全丧失。在这种情况下，呼吸道和肺易受病菌的侵袭而患各种疾病。

When the air is seriously polluted, the purification effect of respiratory tract will be reduced, and even lost completely. In this case, respiratory tract and lung is vulnerable to the invasion of bacteria and diseases.

由于种种原因，空气污染还在加剧。如果不能解决空气污染的问题，恐怕真有一天，人类只能带着口罩生活。

Due to various reasons, the air pollution is getting worse. If you can not solve the problem of air pollution, I am afraid it one day, humans can only live with a mask.

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.

仍有许多问题近年来环境保护。最严重的问题之一是严重污染的空气、水和土壤。空气污染给人们的健康带来极大的危害。被污染的水会引起疾病和死亡。更重要的是,植被已大大减少,现代城市的快速增长。

为了保护环境,许多国家的政府已经做了很多。介绍了立法措施控制空气污染,以保护森林和海洋资源,制止任何环境污染。因此,政府在环境保护中扮演最重要的角色。

在我看来,为了保护环境,政府必须采取更具体的措施。首先,它应该让人们充分认识到通过教育环境保护的重要性。第二,更应努力把人口计划生育政策付诸实施,因为更多的人意味着更多的人意味着更多的污染。最后,那些故意破坏环境者的人应该受到严惩。我们应该让他们知道破坏环境就是毁灭人类自己。

青岛，是我美丽的家乡，这里处处红瓦绿树、碧海蓝天，如果用“惊艳”来形容青岛的美，也不足以表达我对她的赞美之情。但是，我渐渐发现，每月天空晴朗的天数似乎越来越少，雾霾天气却越来越多，如果想要欣赏蔚蓝的天空和无暇的白云似乎变成了一种奢侈……原因是什么呢？答案就是——-空气污染。

致命的空气污染来源于工业生产排放的污染废气，汽车、火车等交通运输工具排放的汽车尾气等，它不仅严重危害着人类的身体健康，人体成年累月呼吸这些污染了的空气，会引起慢性支气管炎、哮喘、肺气肿、肺癌等疾病，还严重影响气候，比如会形成酸雨降落……

亲爱的朋友们，保护空气、杜绝污染，刻不容缓。为了让人类拥有一个健康的生存环境，我们每个人必须从身边每一件小事做起，比如每周少开一天车、每天少抽一支烟，每人种一颗树……我想只要人人付出一点点行动，蔚蓝的天空一定会重新向我们绽放灿烂的笑脸！

In the past few decades, our Earth has changed a lot, but to the bad

direction. Among these changes, the air pollutions resulting from a huge number

of automobiles and coal-burning is almost the severest. The severe air pollution

alarms humans of the heavy load we have exerted on Earth by our insatiable

production and usage of automobiles. However, with the deepening of

urbanization, more cars are needed, which will make the air pollution worse.

Therefore, the following actions should be taken. First, we should apply the

most cutting-edge technologies in order to adopt new forms of energy as

substitutes for fossil fuels. Second, try hard to develop possible

transportation means, which are enviromental friendly. So that the citizens can

reduce the dependence on cars. In short, our humans should take responsibilities

for the air pollution and have to find ways to solve this problem.

空气污染是空气中某些物质的含量超过正常含量时，形成危害动、植物，影响其生存的现象。大气中C0、NH3、SO2、H2S、Cl2、03和N02等物质的正常含量均在百万分之一以下，对动、植物没有明显的不良影响。但19世纪以来，由于工业和交通运输的发展，那些物质大量排入大气，使空气污染日趋严重，影响到动、植物生命活动乃至人体健康。

污染物的来源，有的来自自然界（如火山喷出的烟灰），有的来自人类活动，其中工业、交通运输产生的废气是主要的污染源。空气污染可分为气体污染物和气溶胶状污染物两大类。气体污染物包括SO2，、03，、氮的氧化物以及碳氢化合物等；气溶胶污染物包括固体粒子（粉尘、烟尘气）和液体粒子（烟雾、雾气）两类。直接向空气中排放的污染物质，叫一次污染物。空气与污染物之间相互作用，产生反应，或空气中光化学反应引起的污染物变质所产生的新污染物，叫二次染物。

空气污染物种类很多，其中对农业威胁较大的约有十多种，如SO2、 HF、C12和光化学烟雾等。 气象条件对空气污染物的影响，水平风速和对流层高度是影响大气稀释空气污染物能力的两个气象要素。当农田上空主导风向来自污染源时，农田容易受有害气体的危害；风力强弱则影响空气污染物的扩散速度、污染物在空气中的浓度与平均风速成反比；通常午后湍流强，空气处于不稳定状态时，有利于扩散。夜间晴朗无风，近地面逆温层可使污染物在地面上停滞积聚，加剧空气污染的程度。另外，在准静止的高气压系统中，由于下沉逆温阻止下层排放的污染物扩散到大气上层，可形成近几百米厚的污染层。各国多次发生的严重空气污染事件大都是在低逆温层、风速小和无雨的气象条件出现几天之后形成的。

空气中一些污染物例，如SO2和悬浮于空气中的农药颗粒等，经雨水淋溶落到地面，又可污染土壤和植株。污染物对植物的危害，一般是通过气孔进入植物组织，干扰酶的作用，阻碍代谢机能，有的有毒物质在体内还可进一步分解或参与合成过程，产生新的有害物质，侵害细胞组织，抑制光合作用，使生长受阻、产量降低、品质变劣。其危害分为急性、慢性和不可见危害等。高浓度污染物造成急性伤害，引起产量显著下降，低浓度污染物，在长时间作用下，造成慢性危害，一般症状不明显。不可见危害只造成生理上的障碍，一般没有症状。

植物受空气污染危害的程度，主要受下列因素影响：污染物浓度和植物接触它的时间；植物本身的构造和所处的发育期以及环境条件的影响。如充足的光照，适宜的温度、良好的供水和空气湿润，较高的C02浓度等，都能导致叶片气孔开放，易受污染危害。 植物对大气的净化功能。不少植物具有一种以酶作催化剂的潜在解毒力，能够分解一些有毒物质，或形成一些大分子络合物，暂时可以降低毒性。1公顷森林，每年可吸滞灰尘30多吨，1公顷柳杉林，每年可吸收700多公斤S02，柑桔树的叶子可吸收储存硫达1％，青杨和桑树具有较强的吸收铅尘的能力，加拿大杨、银杏、榆树、梧桐、桉树等都是较好的“天然吸尘器”。草坪的吸附粉尘能力比裸露地面大几十倍。因此环境科学的任务之一，是要充分发挥植物净化大气的作用。选择吸收污染能力强的植物，扩大造林绿化面积，根据污染源位置、污染物汇集区的地形地势、风向和污染气体的季节分配，统一考虑构成一种包围式或隔离式的林带，使含尘气流在移动中途被树林吸收。另方面要研究采取控制或减少排放污染物的措施，以保证大气质量符合规定的标准。