Some people believe that the Earth is beingharmed(damaged) by human activity. Others feel that human activitymakesthe Earth a better place to live. What is your opinion?Usespecific reasons and examples to supportyouranswer.
People have been living on the Earth for thousands of years.Humanactivity influences the Earth. Some people believe that theEarth isbeing harmed by human activity. Others feel that humanactivitymakes the Earth a better place to live. In my opinion, theearth isbeing damaged by human activity. There are manystatementssupporting my opinion.
Human activity has damaged natural environment and almostexaustednatural resources. Modern industry needs more and moreresources,including minerals, fuels and water. So we confront ofthe seriousproblems such as the lack of fuels and water.Ecological balance isdamaged because factories occupy many placeswhere animals andplants live. More and more buildings areconstructed and forestsbecome less and less. If we cannotrecognize these problems andsolve them soon, we would finally losethe environment suitable forour living.
An other serious problem is the green-house effect.Humanactivity decreases forests and increases the usage of fuels sothatthe gas of carbon dioxide is output more and more and there arenotenough plants to absorb it. The green-house effect is moreobviousand more sensible these years. Due to the effect, icebergsin thesouth polar and north polar melt and the sea level becomeshigherthan before. I am worried about the cities nearby the sea andhopescientists find an effective method to eliminate thegreen-houseeffect.
Although we have advanced machines and our life seemsmorecomfortable than before, we have less chances to approachnaturesand less spaces to act. The cities become bigger and if wewant tohave a picnic with our friends, we have to drive a longdistance tofind a natural place. In fact, the spaces of humanactivity arebeing damaged by the skyscrapers and factories.
From the above statements, we can conclude that humanactivitybrings the Earth many damages. Fortunately people haverecognizedthe point and I believe that the Earth will become abetter placeto live with our ceaseless efforts.
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The world is not only hungry,but also thirsty for water. This may seem strange to you, since nearly 75 % of the earths surface is covered with water. But about 97% of this huge amount is sea water, or salt water. Man can only drink and use the other 3% -- the fresh water that comes from rivers, lakes,underground, and other sources. And we cannot even use all of that, because some of it is in the form of icebergs and glaciers. Even worse, some of it has been polluted.
However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall, is still enough for us. But our need for water is increasing rapidly-- almost day by day. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry. Let me give you just one small exampie of how necessary water is to industry. Did you know that to produce a single ton of steel, it takes about 91, 000 liters of water?
We all have to learn how to stop wasting our precious water. One of the first steps we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on a small scale. For us, the systems are as important as the spacecraft.
节约用水
我们的世界不仅饥饿，而且因为缺水而干渴。对你来说这可能似乎奇怪：因为我们的地球表面75％由水覆盖着。但是，这巨大的数量中97％是海水、或咸水。只有剩下3％
的来自河流、湖泊、地下，和其他来源的淡水供人们饮用、使用。即使如此，这3％的水源我们也不能够完全使用，因为有些淡水是以冰山或冰河的形式存在。更糟糕的是，一些水源已遭受了污染。
然而，尽管按现状看来，这些少量的淡水即使时常转化成雨水的形式，对我们来说，也仍然够用。可是我们对水的需求却日益迅速增长。我们只有现在采取措施解决这一问
题才能避免未来世界范围内的严重水资源缺乏。限量供水会对农业和工业产生不良的影响。我们举个小小的事例就能证明水对工业的必要性。每生产一吨钢材就要消耗91，000升水，你知道吗?
我们必须杜绝对宝贵水资源的浪费。我们应该采取的第一步就是要发展水再利用的方法。该领域的实验已在进行，但是仅是小规模地进行。水资源再利用系统的重要性
对我们而言，与空间站不相上下。
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The world we live in is becoming more and more intolerable because of environmental destruction. Bird flu and Sars are two typical examples that environmental destruction may threaten our life. Besides， forest destruction ， water and air pollution result in decrease of planting land and unpleasant weather.
Serious as the problem seems， we can come up with some measures to deal with it. First of all， the authorities should adopt the policy of sustainable development， and laws concerning environmental protection should be put into effect and enforced strictly just as our government has been doing.
What s more， every citizen should realize the seriousness of the problem and make concerted efforts to protect our environment. In addition， planting trees helps improve and beautify the environment.
关于环境保护的
我们生活的世界正变得越来越难以忍受，因为对环境的破坏。 禽流感和SARS的是两个典型的例子，对环境的破坏，可能危及自己的生命。 此外，森林破坏，水和空气污染导致减少种植业土地及不愉快的天气。
严重的问题，看来，我们可以得出一些措施来对付它。 首先，当局应该采取的政策是可持续发展 ， 法律和有关环保工作应该要付诸实施，执法不严，正如我国政府一直在做的事。
何况， 每个公民都应该明白问题的严重性，并共同努力，为保护我们的环境。 此外，植树有利于改善和美化环境。
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