Today the quality of our natural environment has become an important issue. The world population is rising so quickly that the world has become too crowded.

We are using up our natural resources and at the same time polluting our environment with dangerous chemicals. If we continue to do this, life on earth cannot survive.

Concerned people have made some progress in environmental protection. Governments of many countries have established laws to protect the air, forests and sea resources and to stop environmental pollution.

Still more measures should be taken to solve environmental problems. People should be further educated to recognize the importance of the problems, to use modern methods of birth control, to conserve our natural resources and recycle our products. We are sure that we can have a better and cleaner place in the future.

今天，我们的自然环境质量已经成为一个重要问题。世界人口增长如此之快，世界已变得过于拥挤。
我们正在利用我们的自然资源，同时污染的危险化学品的环境。如果我们继续做这个地球上，生活无法生存。
有关人士取得了一些在环境保护方面的进展。许多国家的政府已建立了法律保护，空气，森林和海洋资源，并停止对环境的污染。
但更应采取措施来解决环境问题。人们应该进一步的教育，认识到问题的重要性，使用现代节育方法，以保护我们的天然资源和循环利用我们的产品。我们相信，我们可以有一个更加美好，更清洁的地方。

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　　Pollution has been a serious problem for a certain time around the world. There are many causes for it. Transportation is the main factor of pollution. When the waste gas from cars is released, the air is polluted. People breathing in the polluted air can develop respiratory disease. Another factor is that people throw their garbage everywhere. All kinds of garbage not only spoil the splendid environment, but also cause environmental pollution. What's more, industrial pollution also deserves our attention. Wastewater from factories is poured into rivers and this causes water pollution. As a consequence, the greenhouse effect becomes a problem which needs our immediate caution and how to solve is urgent all over the world. At present, some measures have been taken to prevernt. For example, people classify the garbage and some is recycled after being collected. People are also encouraged to use paper products instead of plastic products because we know that our living condition will be worse if we keep ignoring this problem. And I believe we can prevent pollution if everyone makes the efforts.

污染已经成为一定时期内时间范围内的一个严重问题。 原因很多，交通玉树是主要原因，当汽车排出废气时，空气就被污染了，人们呼吸了被污染的空气，会导致呼吸道疾病。 另外一个原因就是人们随处乱扔垃圾，不仅破坏了美观的环境，还污染了环境。 还有，工业污染也应该受到我们的关注。工业废水排入河流，引起水污染。 温室效应已经成为需要我们立即采取措施并加以解决的问题，而且解决这个问题也是全世界面临的迫切问题。 现在已经出台了一些措施。比如，人们将垃圾分类，回收并循环利用。 还要鼓励人们使用纸质用品代替塑料。 因为我们知道，如果我们仍然忽略这个问题，生活条件将会恶化，我坚信如果每个人都努力的话，我们就一定能防止污染。

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　　Pollution Sources and causes

Air pollution comes from both natural and man made sources. Though globally man made pollutants from combustion, construction, mining, agriculture and warfare are increasingly significant in the air pollution equation.
Motor vehicle emissions are one of the leading causes of air pollution. China, United States, Russia, Mexico, and Japan are the world leaders in air pollution emissions. Principal stationary pollution sources include chemical plants, coal-fired power plants, oil refineries, petrochemical plants, nuclear waste disposal activity, incinerators, large livestock farms (dairy cows, pigs, poultry, etc.), PVC factories, metals production factories, plastics factories, and other heavy industry. Agricultural air pollution comes from contemporary practices which include clear felling and burning of natural vegetation as well as spraying of pesticides and herbicides
About 400 million metric tons of hazardous wastes are generated each year. The United States alone produces about 250 million metric tons. Americans constitute less than 5% of the world's population, but produce roughly 25% of the world’s CO2, and generate approximately 30% of world’s waste. In 2007, China has overtaken the United States as the world's biggest producer of CO2

污染源和原因

空气污染来自于自然和人为来源。虽然从全球人造燃烧，建筑，采矿，农业和战争污染物空气污染日益方程显着。
机动车排放是造成空气污染的主要原因之一。中国，美国，俄罗斯，墨西哥和日本是世界上空气污染排放的领导人。固定污染源主要包括化学工厂，燃煤电厂，炼油厂，石化厂，核废物处置活动，焚烧炉，大牲畜养殖场（奶牛，猪，家禽等），聚氯乙烯厂，金属生产厂，塑料工厂等重工业。空气污染来自农业，其中包括明确的砍伐和自然植被燃烧以及喷洒农药和除草剂的当代实践
约400万公吨的危险废物每年产生。仅美国生产约250万公吨。美国人占不到5％的世界人口，但产生大约25世界的二氧化碳％，并产生约30世界的浪费％。 2007年，中国已经超过美国成为世界上最大的二氧化碳生产国美国

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　　Today the quality of our natural environment has become an important issue. The world population is rising so quickly that the world has become too crowded.

We are using up our natural resources and at the same time polluting our environment with dangerous chemicals. If we continue to do this, life on earth cannot survive.

Concerned people have made some progress in environmental protection. Governments of many countries have established laws to protect the air, forests and sea resources and to stop environmental pollution.

Still more measures should be taken to solve environmental problems. People should be further educated to recognize the importance of the problems, to use modern methods of birth control, to conserve our natural resources and recycle our products. We are sure that we can have a better and cleaner place in the future.