环境污染类英语作文汇编20篇

Important to save water

Water is a kind of liquid. It has no taste or smell. It is transparent, too. Water is useful and is important to us. Why? For example, we use water to water the plants. We use water to wash our face or to have a bath. We drink water or we will die…Water is also very important for China. There are 2.8 hundred millions of steres of water in China, but everyone can only use 2300 steres. It is only twenty–five per sent in the world.

Not too long ago, there was a man called Jacques Cousteau. He loved the beautiful colors, and the beautiful fish in the sea. However, when he returned some years later, the colorful coral reefs were dead and grey because the factory near the sea poured waste water into the sea. Jacques Cousteau decided to tell people how important it was to save the environment under the sea. He started the“ Cousteau Society ” to help protect life in the sea. Now there are over 30000 members all over the world. Since water covers most of the earth, Cousteau knew that we should keep the sea clean. We should not litter the sea, and should clean up the dirty parts. As water is very important to our environment, he encouraged everyone to take part in protecting our lakes, rivers, sea and ocean.

There are still a few people who are not protecting the water now in the world. For example, some factories pour waste things into the rivers, lakes or into the sea near by. The water there has become very dirty and we can’t use them at all. Although there are seventy–five per sent of water in the world, we can only use fresh water, that there is only a little. So we should use little water when we need to use it. For example, I do not use too much water when I am washing my face or having a bath… It is important for us to keep the water clean. You may ask yourself, have I ever poured or thrown dirty things into the water? If your answer is “No”, that means you have already helped to protect the environment. It is our duty to protect the environment. You may ask yourself again, have I ever helped to clean up the water? If your answer is “Yes”, that means that you have already done something useful to improve the water. If we use up all the water, it is difficult for us to get it from anywhere, including the universe. It is terrible to think that people are too thirsty to live! I believe, that if everyone helps to protect the water, the water must be protected. You do not want to “kill” your son or your grandson, do you? So now let us to protect the water! Please don’t let the last drop of water on the earth is we human’s tear!

家乡变了，真的变了！天空变暗了；小鸟变少了；小河变浑了，就连鱼虾都“躲”了起来。

家乡变的原因还是冒滚滚浓烟的烟囱和污水。这几年来，工厂不断的生产，废气从烟囱里冒出来，污水不断从管道里淌出来。还有就是人们乱堆垃圾，把地球的“外衣”破坏了。就这样，家乡被污染了。

小河在哭泣，哭泣自己没有伙伴；小鸟在呼吁，呼吁自己美好的家园；地球在痛苦，痛苦自己没了外衣；

我知道，原来家乡不是这样的。原来的家乡天是一片碧蓝，河是清澈见底，鱼虾自由自在，鸟儿成群飞翔。而现在呢？现在的家乡已不是昔日的家乡了，现在……

小鸟呼吁人类：人类，请你们不要把树木砍伐，让我们无家可归，四处流浪。我呼吁人类：请你们不要把垃圾四处乱丢，让空气变的浑浊，请你们为自己想一想，如果哪一天空气没了，你们会怎么样？

让我们一起保护自己的家园，不要让家园的环境再变难看，而要让家乡的环境变得更美！一起行动起来，为自己创造一片蓝天吧！

how to save environment? i think we should do the followings: first, it’s best to ride a bike to school, don’t take a bus or a taxi. second, i will remember to turn off the lights when i leave the classroom. third, in my free time, i will collect the empty bottles and waste paper for recycling. the fourth idea is turning off the shower when i ‘m not using it. fifth, it is imporment to save water and money. also, i won’t spend too much money on expensive things. last, we had better not cut down the trees, we have to take care of the trees . i’ll try my best to save the energy, i hope i can do something for our country.

the environmental protection is the most major problem which in the modern life the humanity faces. must solve this problem must start from foundation. first, must massively propagandize, enhances peoples consciousness with understanding, strengthens the environmental protection consciousness. next, must carry on waste recovery use, reduces to forest-trees felling. also must strengthen to white pollution processing, little uses the plastic product. finally, must make improvement to clean aspect. causes the citys appearance to be neater. for earths tomorrow, we must start from the now diligently, will want the well local constable to protect the environment. to this us proposes as follows suggests: implementation trash classification packed in bags. like this not only can reduce the environmental sanitation workers work load, but also can even better basically arrive makes use of waste, to reduce the pollution, saves the resources.

How to protect the environment has become one of the biggest problems in the world .

It’s our duty to protect our environment . No matter where we live , we should do something to keep our neighborhood clean and tidy . We can collect waste paper or other waste things for recycling. We should plant more trees and we should prevent those factories from pouring waste water into rivers, lakes and fields. We shouldn’t leave rubbish everywhere and spit in public places . We mustn’t pick the flowers or step on the grass in public. If everyone tries his best to protect the environment , the world will become much more beautiful and our life will be better and better .

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.

随着科技的高速发展，人类对资源的需求越来越多，致使南极北极冰雪融化的速度加快、海平面日渐上升、南极出现臭氧空洞、北京的沙尘暴、雾霾天气不断增加、日本大地震后造成的核泄漏污染……

当我们在享受美好生活的同时，是否想到保护环境的重要性呢?

那么，请同学们关注一下我们的校园，看!操场上、校门口、楼梯过道上漫天飞舞的纸屑、食品袋、饮料瓶;瞧，雪白的墙壁上那些张牙舞爪的涂鸦……这些都是和我们校园文明不和谐的一幕啊!

同学们，如果我们大家都行动起来，争当环保的主人翁，不乱扔纸屑、果皮，不乱涂乱画，随手捡起地上的纸屑垃圾，爱护环境，把我们的校园装扮的漂漂亮亮。当我们在绿树成荫的校园小道上漫步时，一定会感到心旷神怡;当我们在窗明几净的教室里读书时，一定会全神贯注;当我们在整洁优雅的环境中学习时，一定会心情舒畅。

优美的环境，让我们懂得珍惜，学会爱护;优美的环境，让我们知书达理，更加文明;优美的环境，让我们学会谦让，学会做人;优美的环境，让我们道德高尚，使我们的学习更加进步!

我是一条河，我非常快乐，我有很多朋友：小鱼、大树和小朋友们。

随着时光的推移，以前健壮的我，现在却这样瘦弱。以前美丽的我，现在却如此的丑陋呀!以前我整天欢快地歌唱，而现在我每天都看着天空，不断地唉声叹气。这都是因为我身上的这一大堆垃圾。我的脸上自从有了泥沙，就成了一个便利又肮脏的垃圾地。一旁的大树吸取了脏的水，还差点枯死。那天，小鱼也带着所有伙伴悄悄地离开这里。为了不让我太伤心，小鱼们在夜里行动。

那次，有两个小男孩回家路过这里，其中一个说：“我们快走，这里太臭了!”另一个人点点头。于是，他们风一样的跑远了。“你们别走啊!”我大声地喊。可是，再怎么喊也是没用的，因为谁愿意到这个“垃圾场”边玩呢?这时，我的眼睛里不禁留下了眼泪。

人类，请你们不要乱扔垃圾，这样，你不仅仅是破坏环境，还会危害地球。为了我们共同的家园，请一起保护环境吧!

As the technology and economic is developing, the environment problem is becoming a severe problem, and the people are seriously affected.

随着科技和经济的发展，环境问题变得严峻，人们也受到严重的影响。

The sustained damage to the environment has caused a serious problem, such as air pollution, sand storm, extraordinary weather, and diseases etc., people suffer from what they have done to the environment.

对环境的持续破坏已经导致了一系列问题，例如大气污染，沙尘暴，反常气候还有疾病等等，人们对环境的破坏让他们尝到苦果。

However. People have realized that it will be too late if they don’t do anything to prevent things from getting worse. For example, there is an “Earth Hour” on a Saturday of March of each year. It is a global movement, usually it lasts from 8:30pm to 9:30pm. It is also called “Light-off for One Hour”. During this hour, all the light will be turned off. The purpose of this movement is not only to save energy, but also to warn the people to realize the importance of protecting the mother earth, and to stop violating the environment.

然而，人们已经意识到，如果他们不做些事情来防止情况继续变糟的话，就太晚了。例如，每年三月的一个周六，有一个“地球一小时”，这是一个全球性的运动，通常从晚上8:30持续到晚上9:30。也叫做“熄灯一小时”。在这一小时里，所有的灯将会被关掉。这个运动的目的不仅仅是节约能源，还警示人们意识到保护地球母亲的重要性，停止对环境的破坏。

Anyway, people and the environment have to keep a balance relationship. People take from the environment, and have to protect it too.

无论如何，人与环境必须要保持一种平衡关系。人从环境索取，也要保护它。

一天，小燕子飞在小河上空，远处工厂的烟囱里冒出一股股灰烟，遮着了太阳和蓝天。

漂着垃圾的小河里，小鱼探出头来，它问道：“你知道为什么河水那么脏吗?”小雨嫌弃的看着自己身边的漂浮着的垃圾。

小燕子叹了口气说：“那是人类不爱护自己的家园造成的。”

“我真羡慕你，如果这个地方受污染了你还能飞到另外一个地方，而我却只能呆在这里。”小雨无可奈何的说。

小燕子悲愤的说：“人类难道不知道是大自然抚育了他们，他们难道不应该和我们一起保护大自然吗?”小燕子越说越激动!

小鱼的情绪也波动起来，忧心忡忡的说：“地球是我们共同的家园，我们大家应该一起呵护它!

小鱼又说：“我们虽然无法改变环境，但我们可以改变自己的心情!”小鱼说完尾巴一翘就游走了。

小燕子若有所思的想着刚才小鱼说的话······

[关于环境和污染作文400字

The school, is the world of knowledge, the school, is our friends paradise, it provides us a healthy and beautiful learning environment.

Let me introduce our school. Once inside the school gate, two rows of straight palm trees stand on each side, like two young pioneers, guarding the campus. Two beautiful little gardens behind them, the flowers in them are beautiful. The willow tree in the playground, graceful, the spring comes, she was combing her hair, as if in waved to us, one side of the Holly and poplar have also show their new clothes. The pleasant scenery of the campus has created a comfortable learning environment for us to grow healthy and lively.

However, there are a few students behavior, let we see what we dont want to see: the playground, there will always leave some on the corridor, corridor confetti and small bags; On the lawn, the green belt occasionally discovers the deep footprints left by the students. Others have turned the desks in the classroom into "cat faces"; Not to save water, to lose precious water, and to make the flower bed a playground...

如今的环境越来越糟糕，我不禁为我们中国人所生活的环境而感到担忧，以及我们中国人的身体。

今天早晨，一出门，一股刺鼻的气味便扑面而来，我无处躲避只得嗅着这股气味行走。我仰望天空，发现原本湛蓝的天空变成了灰色，如一层纱巾蒙在上面。我是一个对于环境很敏感的人，我走在路上，使劲用手捂住口鼻，担心那污浊的空气进入我的鼻腔。

其实，我心里也清楚，这是无用的。因为那些微粒很小，仅仅是捂住口鼻根本无法阻止其穿过手指间的缝隙进入呼吸道。但我还是这么做，为的就是图个安心。

说到这里，我不禁想到暑假时的车辆限号行驶。在那几天，天空格外晴朗，一连几天都没有阴天的迹象，我想这不是巧合，这真的是起了货真价实的作用。可是，这种制度没有长期维持下去。

我个人认为，环境的保护应该从我们自己做起，只有这样环境才会有所改善。

对于如今环境污染之严重，我们应该重视起来，并努力去改善环境！

Environmental protection is every one of us to do, make the responsibility of each of us, once you live in the earth, you have to protect the environment, because we want for our children and grandchildren, give them a good living environment, and not to harm the environment and harm to our children and grandchildren.

Its our duty to protect the environment, and some people said: this is an important task, we are a little, it should give the big man to do, we have to do is not to undermine. Many people agree that in the face of this statement, and the I will against it. In fact, environmental protection is more than a great thing, or do we all the citizens of these things, and they will go to the governance, we control our things, mind your own affairs, because environmental protection from a small one.

Environmental protection is a small matter, dont throw a piece of junk, dont chop down a tree, not a one-time items... Maybe, you have the conditions, is a piece of junk, recycling plant a tree, with an item again... This is to protect the environment, is so simple, need not you do more difficult things, environmental protection is just as simple as that.

环保是我们每个人要做的事情，使我们每个人的责任，你一旦生活在地球，你就要保护环境，因为我们要为我们的子孙后代着想，给他们一个好的身活环境，而不是去破坏环境，危害我们的子孙。

保护环境是我们的责任，而有的人却说：这是一个重任，我们是个小人物，这应该给大人物去办，我们不破坏就行了。面对这种说法，很多人都同意，而我就反对。其实，环保不止是大人物的事情，还是我们这些市民的事情，而他们就去治理大事，我们就治理我们的事情，管好自己的小事，因为环保是从一件小事做起的。

保护环境其实是一件小事，不扔一件垃圾、不砍一棵树、不用一次性用品……也许，你有条件的话，就回收一件垃圾、种一棵树、再次用一件物品……这都是保护环境的行为，就是如此简单，不用你做更难的事情了，环保只是这么简单。

Recently, a Chinese student who studied abroad delivered a speech at the

graduate ceremony. Her speech soon became the hot issue, because she criticized

Chinese air pollution, which was a great threat to her health. Though her speech

had exaggerated the problem, it is true that China has faced many pollution

problems. The haze in Beijing is famous around the world, which is the

punishment for human to ruin the environment. It needs time to fix the problem,

but there is no need to deny our country. Even for the developed countries, they

have once faced such problem before. We can do something in the daily life to

protect it, such as do not throw away the rubbish.

I study in the No.1 Primary School. Its one of the best primary schools in my city. There are four buildings in campus.Two of them are teaching buildings. The other two are library and gym. The teaching buildings are huge and the classroom is large and bright. There are plenty of books in the library. I like reading books in the library. After class, students like playing in the gym. It’s a popular place after class. Besides, our teachers are great. They care much about students. I am happy to study in my school.

我就读于我们市的第一小学，那是我们这最好的一所小学。学校共有四栋建筑，两栋是教学楼，另外两栋分别是图书馆跟体育馆。我们的教学楼非常宏伟壮观，教室也是又宽敞又明亮。图书馆里面有很多藏书，所以我非常喜欢在那读书。课间时候，同学们都喜欢在体育馆里玩，那儿可是个热闹场所。另外，我们的老师也非常好，对学生都很关心。我喜欢在这所学校读书!

We live in the beautiful earth, its a pity that the earth is every day under the various odor, chemical items, poison, carrion, automobile exhaust, living garbage, factories and so on dirty garbage pollution, make our lovely earth gradually degradation. So to protect the environment is the duty of every man.

Plants and trees is human natural oxygen "manufacturer". But the deforestation, the destruction of the ecological balance of nature; Sand dunes to gobble up the fertile land, white; Floods can be our lovely home. Relentless stuff we clear the river becomes cloudy. Dense forests become sparse clutter, the blue sky become dark, green mountains become bald. Mud-rock flow, dust storm, flood... These disasters are caused by a dirty environment. So we should protect the environment.

How to protect the environment? First of all, cant litter, saw rubbish pick up, is the environment become clean and beautiful. Second, do not arbitrarily trample flowers and plants trees. To plant trees, a variety of flowers and plants.

Electricity, bring us all kinds of convenience, especially gives us light, lit up the colorful world. But we want to save electricity, because electricity is mostly produced by burning coal. Save electricity is to save from coal, less waste, and only enough storage of coal mining in our country in one hundred years! We think, more than one hundred years later, our children and grandchildren to do? So we should save electricity, the usual lamp, use energy-saving light whenever possible.

Protect the environment, everyone duty. Lets start from me, start from now, start from the side of dribs and drabs.

我们住在美丽的地球上，可惜地球每天都饱受着被各种臭气、化学物品、毒汁、腐尸、汽车尾气、生活垃圾、工厂垃圾等等肮脏污染，使我们可爱的地球逐渐退化。所以保护环境是每个人义不容辞的责任。

花草树木是人类的天然氧气“制造厂”。但人们乱砍乱伐，使大自然的生态平衡遭到了破坏;沙丘吞噬了万顷良田;洪水冲毁可我们可爱的家园。无情的杂物把我们清澈的河水变得浑浊。茂密的森林变得稀疏杂乱，蔚蓝的天空变得灰暗，碧绿的青山变得光秃。泥石流、沙尘暴、水灾……这些灾害，都是由肮脏的环境造成的。所以我们更应该保护环境。

如何才能保护环境呢?首先，不能乱扔垃圾，看到垃圾就捡，是环境变得整洁优美。其次，不要任意践踏花草树木。要多植树，多种花草。

电，给我们带来各种便利，特别是给我们带来了光明，照亮了五彩缤纷的世界。但是我们要节约用电，因为电大多是烧煤产生的。节约用电就是节约用煤，少排废气，而在我国储藏的煤只够开采一百多年了!大家想想，一百多年以后，我们的子孙后代该怎么办?所以我们要节约用电，平时的照明灯，尽可能用节能灯。

保护环境，人人有责。让我们从我做起，从现在做起，从身边的点点滴滴做起。

目 的：针对水环境污染问题调查。

时 间：2011年3月8日

地 点：村里的池塘

调 查 人：___

指导老师：__、__

调查记录：

奶奶对我说：“以前农村里的池塘可干净了，小鱼水藻都看得见，小孩子都在塘里洗澡。旁边还种了许多桂花树。夏天在树下乘凉，秋天那淡淡的清香可好闻了。

可现在呢?池塘被养殖户承包去养珍珠，大量的鸡粪倒进塘里，塘边的蚌壳成堆，桂花树早已枯死，特别是到了夏天臭气熏天，行人望而生畏。

建议：

1. 承包户不用为了多挣钱而破环生态环境;

2. 有关部门是不是可以规划地区，让养殖户集中养殖。

我的建议可能很幼稚，也可能一时实现不了。但是，只要每个公民行动起来，团结一心。那么，我们的家园会变得更加美丽!

1、But save square inch ground, stay with descendant Geng.

但存方寸地，留与子孙耕。

2、Protection of the environment is everyones responsibility.

保护环境，人人有责。

3、Rescue the Earth is to rescue future.

拯救地球就是拯救未来。

4、The amount of water which is suitable to drink is less and less.

水的量是适宜的饮料是越来越少了。

5、But some people dont care about it.

但有些人不关心它。

6、It is very important to take care of our environment.

这是非常重要，我们要保护我们的环境。

7、Now people pay more attention to how to pretend our environment .With the development of science and technology,it becomes more important to pretend our environment.In china,prentending environment is very nomal in our life for the Olympics coming or the peoples sense of environmental pretection.

环境保护是当今社会的一大热点问题。随着科技的发展，环保显得越来越重要。在中国，也许是奥运会的临近，也许是人们意识的崛起，环保已经成为我们身边一个普遍的存在了。

8、It“s our duty to protect our environment.

它”是我们的责任来保护我们的环境。

9、Many rivers and lakes are seriously polluted.

许多河流和湖泊受到严重污染。

10、The rubbish will pullute the enviroment .It is bed for our health.So please dont throw about the rubbish.

垃圾污染环境，损害健康，不要到处扔垃圾

11、Its our duty to protect our environment。

保护我们生存的环境是我们的责任和义务。

12、The waste water will pour into rivers,lakes and fields.It will harm the crops ,kill a large number of fish.

废水流到河里，湖里和田野里，污染农作物，杀死大量的鱼。

13、Its everyones duty to love and protect the environment.

这是每个人的责任，爱护和保护环境。

14、Cherish the source of nature, totally make a living a life green.

珍惜自然之源，共营生命绿色。

15、It is very important to take care of our environment.

这是非常重要，我们要保护我们的环境。

16、Something must be done to stop the pollution.

必须采取某种措施来制止污染。

17、We should not spit in a public place/ cut down the trees.

我们不应该在公共场所吐痰/砍伐的树木。

18、We should plant more flowers and trees.

我们应该种更多的花和树。

19、If everyone makes contribution to protecting the environment, the world will become much more beautiful.

如果人人都为保护环境作出贡献，世界将变得更加美丽。

20、We must pick up some rubbish and throw it into a dustbin.

我们必须拿起一些垃圾，扔到垃圾桶它。

21、As we know , water is very important to man.

我们知道，水是非常重要的人。

22、We cant live without water.

我们的生活离不开水。

23、We should not throw litter onto the ground.

我们不应该往地上扔垃圾。

24、Treat kindly the Earth is to treat kindly oneself.

善待地球就是善待自己。

25、Trees are very helpful and important for us.

树是非常有益的，对我们很重要。

26、How to pretect our enviroment has been one of the most difficult problem in the world.

如何保护环境已经成为世界最大难题之一。

27、We should plant more and more trees in order to live better and more healthy in the future.

我们应该种更多的树，为了生活得更好，更健康的未来。

28、Keep the enviroment clean and tidy.We have only one earth.We should try our best to pretect it,make our home more and more beautiful.

保持环境干净和整洁，我们只有一个地球，应该保护它，使我们的家园更加美丽。

Environmental Pollution

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 of 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.

环境污染

最近我读了一则消息说在日本，许多商人向顾客出售新鲜空气，现在这种情况越演越烈，Environmental Pollution-环境污染，四六级写作《Environmental Pollution-环境污染》。为什么呢? 因为在日本新鲜空气越来越少，在美国也是如此。

事实上，环境污染是整个世界正在面临的一个严重问题。这主要是由于人造物质，工业生产过程中所产生的废料以及消费商品的增长造成的。另外，在农业中使用化学物品也造成了环境污染。看看天空，你可以看到浓烟从高大的烟囱中释放出来，这些脏而有毒的物质流入我们赖以饮水的河流，数百万吨废物正堆积在我们周围。

怎样改变这种状况呢？越来越多的国家正在试图拟定出一些有效措施控制环境污染，但至今成效不大。

[环境污染英语作文附翻译

This summer vacation, I joined a social practice to be a part-time tourguide. There I found something that impressed me a lot.

People who love traveling are always finding places to take a vacation, which caused a lot of troubles.For example, I found that some people were used to dropping out the trash everywhere. They just regarded the sightseeings as their houses, which cost a lot to clean it up. Besides, some one should write down their names on the trees and walls. People who wanted to leave their names whereever they went are always to punish in future.

Nevertheless, I also found some good examples, such as teaching tourists not to destroy the places of historic interests, helping clean up the environment,etc..I think we all need to teach more people not to hurt our precious nature. What we really need to do is protect them form destroying.

今天我和妈妈在八街坊看到一条小河，小河特别脏，河水像倒了许多浓墨似的，很黑很黑。河面上漂浮着一层油，河面上还躺着许多塑料袋、杯子等。河水很臭，阵阵臭味直往我鼻孔里钻，小河无声地流淌着，像在偷偷哭泣。我问妈妈，河水为什么这么脏?

妈妈告诉我，以前这条小河很干净，很美丽。河水很清很清，里面有许多小鱼在水里自由自在地游来游去。河水很甜很甜，吸引了许多小鸟来喝水。水里还有许多水生植物，充满了生机。后来，这条小河被人们弄脏了，人们把大量的生活垃圾都倒在了河里，工厂把大量的废水都排进了河里，水里的小鱼都被毒死了，小鸟再也不敢来喝水了。从此，小河再也没有生机了。

听了妈妈的这些话，我感到非常可惜。我想：以后人们再也不能把生活垃圾倒进水里了，工厂再也不能把废水排进河里了。我们每个人都要爱护身边的环境，使我们身边的环境更加美丽。

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.