Global Warming: English Composition 地球升温

Topic:

The Impact of Global Warming on Our Planet
地球升温对世界的影响


by englishcomposition@hotmail.com

Note: 注意
Thesis--cause, effect, solution of global warming 主题--升温之因果与解决之途径
Content organized in 4 paragraphs: 内容放在4段的结构上
1. The earth faces global warming. 地球面临升温
2. Effect 影响
3. Cause 原因
4. Solution 解决
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Essay: 样文



Our planet has a problem. It's getting warmer without having been noticed until more recently. Scientists mostly agree that global warming is alarming, warning that, unless joined actions are taken without delay, human beings could face danger of extinction probably within this millenium. It's now known, at least in part, the cause and effect of this phenomenon known as greenhouse effect. Many countries are involved in looking for solutions.

The effect of such a phenomenon has become a world-wide concern. Some climate changes are too obvious to be ignored. Whatever its causes, global warming may have contributed to more extreme weather from droughts to severe floods. Scientists have found the gradual shrinkage of ice shelves in Antarctica. They say that several ice shelves have retreated and collapsed in the past 50 years. As a consequence, sea levels are rising through the thermal expansion of water and the melting of glaciers around the world.

Ozone depletion has been held accountable for the cause. For roughly a billion years, scientists say, the ozone layer of the earth's atmosphere has shielded our planet from the sun's ultraviolet rays. Thanks to human beings' industrialization and modernization, plus pollution of millions of automobiles, gases and other man-made chemical compounds have punched a hole twice the size of Europe over Antarctica. Our world is now less protected than it used to be before the Industrial Revolution.

Fortunately, there is an increasing awareness of the problem of pollution as a result of human activity. As of 1997 more than 160 countries had signed the Montreal Protocol, committing to cut use of CFCs in half. Since then concentrations of ozone-depletion chemicals seem to have started decreasing. Another good news is that ozone-depletion is said to be reversible, meaning the ozone layer may even return to its original state sometime in the future. If not, human beings have only themselves to blame.