急!!just打返d字幕出黎!!

AH!I tried my best. Some words are hard to recognize, but I think you'll still be able to understand the main idea. If some mistakes were made, I apologize.

For 2.5 million years, the Earth's climate has fluctuated, cycling
from Ice Ages to warmer periods. But in the last century, the temperature has risen usually fast, about 1.2 to 1.4 degrees Fahrenheit. Scientists believe it's human activity that driving the temperatures up, a process known as global warming. Ever since the Industrial Revolution began, factories, power plants, and eventually cars, have burned fossil fuels, such as oil and coal, releasing huge amount of Carbon Dioxide and other gases into the atmosphere. These green house gases trap heat near the Earth through a naturally occurring process call green house effect. The green house effect begins with the sun and the energy radiates to the Earth. The Earth and the atmosphere absorb some of this energy, while the rest is radiated back into space. Naturally occurring gases in the atmosphere trap some of this energy and reflect it back, warming the Earth. Scientists now believe that the green house effect is being intensify by the extra green house gases that human had released. Evidence for global warming includes a recent string of very warm years. Scientists report that 1998 was the warmest year in measured history with 2005 coming in second. Meanwhile, redeems taken from ice core show that the green house gases Carbon Dioxide and Methane had hit their highest level in the past 420thousand years. Arctic Sea is also shrinking, according to NASA's studies the extent of Arctic Sea has declined to 10% in the last 30years. As long as industrialized nation consume energy and developing countries increase their fossil fuel consumption, the concentration of green house gases in the atmosphere will continue to rise. Researchers predict that temperatures will increase about 2 to 10 degrees Fahrenheit by the end of the century.

2009-09-25 07:42:13 補充：
What's less certain is what rising temperature mean for the planet. Some climate models predict subtle changes.

2009-09-25 07:45:13 補充：
What's less certain is what rising temperature mean for the planet. Some climate models predict subtle changes.

2009-09-25 07:45:57 補充：
Others forecast rising sea-level, which could flood, cause celery around the world; weather patterns could change, making hurricane more frequent; severe drought could become more common in warm areas, and species unable to adapt the changing conditions would face extinction.

2009-09-25 07:46:16 補充：
Although much remains to be learned about global warming, many organizations advocate cutting green house gassing missions to reduce the impact of global warming.

2009-09-25 07:46:43 補充：
Consumers can help by saving energy around the house, switching to compact fluorescent light bulbs, and driving fewer miles in car each week. These simple changes may help keep the Earth cooler in the future.

2009-09-25 07:52:52 補充：
What's less certain is what rising temperature mean for the planet. Some climate models predict subtle changes.

2009-09-25 07:53:17 補充：
What's less certain is what rising temperature mean for the planet.

2009-09-25 07:54:00 補充：
What's less certain is what rising temperature mean for the planet. Some climate models predict subtle changes.

2009-09-25 07:54:37 補充：
唔知做咩淨返個D 打唔晒 我試下留係意見度

2009-09-25 10:31:59 補充：
-.-嘩 個yahoo好sort
頭sin留極都唔顯示出黎
突然間就有咁多
我係度留多次剩返個d勒
之前個d好亂

2009-09-25 10:32:17 補充：
What's less certain is what rising temperature mean for the planet. Some climate models predict subtle changes.

2009-09-25 10:32:31 補充：
Others forecast rising sea-level, which could flood, cause celerious around the world; weather patterns could change, making hurricane more frequent; severe drought could become more common in warm areas, and species unable to adapt the changing conditions would face extinction.

2009-09-25 10:32:46 補充：
Although much remains to be learned about global warming, many organizations advocate cutting green house gassing missions to reduce the impact of global warming.

2009-09-25 10:33:05 補充：
Consumers can help by saving energy around the house, switching to compact fluorescent light bulbs, and driving fewer miles in car each week.

2009-09-25 10:33:19 補充：
These simple changes may help keep the Earth cooler in the future.

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