急求.初三英语作文(关于环保的)快 我会追加分的

匿名用户
2010-10-27
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地球,是颗负重太多的行星,它煞费心机,创造世界,可是,人类却将其一一摧毁,所以人类的智慧有时在自然面前显得微不足道。我们没有理由再对一颗适于我们生存的行星进行破坏。或许,当一个人还在爱自己的时候,特就应该爱地球,因为人是最具有爱心的,也是善良的,这是人的本性,更是做人的标准。如果你还认为人类没有过错的话,那么,就请你想一想,当地球在偷偷抹眼泪的时候,你在干什么呢?
自人类诞生之日起,就不断地向地球索取,到了近现代,这种索取更是一发不可收,小小的地球已是千疮百孔,但是仍然不能阻止人类的放肆,尽管我们还要生存,后代还要生存,但是这一切远远比不上人性的贪婪。不过,大自然有它的生存法则,它或许也知道恶有恶报,不然,怎么会进行反击呢?1998年洪灾暂且不说,那震惊全球的日本水钨湾的“贡污染事件”应该不会陌生吧!人们在食用那些污染的鱼和贝类后,相继出现了神经性疾病,这难道不是对人类生存权的挑衅吗?还有,北海由于污染严重,1988年竞有1700多只海豹病死。

全球变暖与城市“热岛”
全球变暖会引起世界各地区降水与干湿状况的变化,进而导致世界各国经济结构的变化。中纬度地区将会因气候变暖使蒸发强烈而变得干旱,现在农业发达的地区将退化成草原;高纬度地区则会因变暖而增加降水,温带作物将可以在此安家。但就全球来看,气候变暖对世界经济的负面影响是主要的,得到好处的仅是局部某些地区。
城市的气温比近郊要高得多,犹如一座温暖的岛屿。我国最大的城市“热岛”北京,比郊区温度高出9.6度,上海与郊区的最大温差也达6.8度。造成城市“热岛”效应的原因在于城市人口集中并不断增多,工业发达,居民生活、工业生产和汽车等交通工具每天要消耗大量的煤、石油、天然气等燃料,释放出大量的人为热。还有一个原因是城市中由混凝土、石料、砖瓦堆砌成的建筑群与柏油、水泥、陶瓷、石料等铺设的路面、人行道、广场,代替了原为植被、作物覆盖的自然地面。它们反射率小,热容量高,大量吸收太阳能。
物种迅速灭绝
由于人类活动的影响,尤其是人们乱伐森林、滥垦草原,以及环境污染,造成了野生
动植物栖息地或生长地的丧失和生活环境的恶化,再加上人们滥捕滥猎野生动物,使世界上许多种野生动植物已经灭绝或濒临灭绝。
国际保护自然联盟1996年发表的濒危物种《红色警报名单》显示,世界现存4500种哺乳动物中,面临绝种的已占24%,而现存约9500种鸟类中,有12%即将灭绝。在已知的大约1万种木本植物中,濒临绝种的约占6%,其中1000种左右危在旦夕。每24小时就有150~200种生物物种永远告别地球,据资料表明,目前地球上物种灭绝的速度比形成的速度快100万倍。中国是野生动植物十分丰富的国家,但是,中国生物的多样性正面临严重的威胁。被子植物中,濒危种有1000种,极危种28种;裸子植物濒危种63种,极危种14种,已有1种灭绝;脊椎动物受威胁的有433种。
世界水资源严重不足
随着世界人口的急剧增长,用水量不断增加,加上水污染日益严重,使许多本来可以
利用的淡水资源遭到破坏。目前世界上60%的地区面临供水不足,已有20%的人口难以得到清洁水,50%的人口无法得到卫生用水。许多国家用水紧张,近年来美国、日本及东欧许多国家都出现了水资源不足的问题,甚至连淡水资源比较丰富的俄罗斯与加拿大,有些地区也受到缺水的威胁。非洲的一些国家连年干旱,缺水直接威胁着人们的生存。有人预计,水危机将成为21世纪城市里“最容易引起争端的问题”。
hope16173
2010-10-19 · TA获得超过2382个赞
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Environmental problems are becoming more and more serious all over the world.
For example, cars have made the air unhealthy for people to breathe and poisonous gas is given off by factories.
Trees on the hills have been cut down and waste water is being poured continuously into rivers.
Furthermore, wherever we go today, we can find rubbish carelessly disposed. Pollution is, in fact, threatening our existence.
The earth is our home and we have the duty to take care of it for ourselves and for our later generations.
Fortunately, more and more people have realized these problems.
Treat the Earth-from the little things around us!
I asked my father to give up smoking.I make rubbish sort for different use, papers, batteries,bottles and so on.
Also doing small things can make a big success, we must do it for earth!
It's time that we must do something useful to protect our environment. We can plant trees and take good care of them. We can save the water and ask our parents to do so. We can't throw any litter onto the ground and we should collect them for recycling.
Let's moveing to be an Environmentally small defender!
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falseair
2010-10-20 · TA获得超过6580个赞
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Protection of the Environment
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 become 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 won't 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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jie373662056
2010-10-19
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There are many kinds of pollution around us,such as air pollution,soil pollution,noise pollution,and light pollution.They are bad for uor health in manyways.
The air pollution can cause soreeyes and breathe problems.The soil pollution can cause unhealthy food.Noise pollution can make people go deaf.
With less pollution,our plant will become greed andour health will be better.Let's be greener people.
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