First Man-Bear-Pig, and now global warming; it seems Al Gore never stops to surprise the world. Recently Al Gore produced the movie An Inconvenient Truth which explained the threats and told us how to control global warming. What it left out is that there is no proof that human activity is even causing global warming, let alone if global warming is even taking place.

Global warming is the idea that greenhouse gases that shut in infra-red (紅外的) radiation in the earth' s atmosphere are becoming more powerful and heating our planet up. The theory is that if the planet continues to heat up the polar ice caps could melt and cover the earth in water.

Over the last 100 years the Earth has increased one degree in temperature, and sea level has risen millimeters. Even though this "eye-opening" news is taking place, there is no clear proof saying that it is due to global warming. It could be just a regular weather pattern the earth is circulating. The polar ice caps have not grown or reduced in size since man began tracking them. Also the ground-based temperature has remained the same besides growing cities. In fact most clues support the idea that global warming is not taking place and human activity isn’t causing any earth to melt down.

Although Al Gore insists the world is on its way to certain destruction, the facts say otherwise. It seems that driving to work won' t lead to the doom (末日 ) of mankind, and the movie Water World won' t be happening any time soon.

 

71. It is likely that Al Gore _____.

A. is concerned about the threat of global warming    B. holds that human doesn’t cause global warming

C. knows how to stop global warming successfully   D. doesn’t believe global warming is taking place

72. Global warming is the idea generally about ______.

A. greenhouses      B. infrared radiation  C. greenhouse gases  D. the atmosphere

73. According to the passage, which of the following is NOT true? ______.

A. The earth has risen 1ºC temperature in the last century

B. The sea level is incredibly higher than any time before

C. Some people are upset at the news of global warming

D. The polar ice caps haven’t grown or reduced in size

74. The author believes that ______.

A. most proofs support global warming is happening

B. human activities contribute little to global warming

C. driving to work will lead to the end of mankind

D. A "Water World" will be happening very soon

75. ______ can be the best title of the passage.

A. "A Threatening Film by Al Gore"          B. "The Causes of Global Warming"

C. "The Doom of Mankind?"                    D. "The Polar Ice Melt Down!"

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