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What do Thomas Karl and Kevin Trenberth believe as to air pollution?
What do Thomas Karl and Kevin Trenberth believe as to air pollution?
admin
2009-06-24
47
问题
What do Thomas Karl and Kevin Trenberth believe as to air pollution?
There can be no doubt that global warming is real and is being caused by people, two top U.S. government climate experts—Thomas Karl, and Kevin Trenberth said.
Industrial emissions are a leading cause, they say—contradicting critics, already in the minority, who argue that climate change could be caused by mostly natural forces.
"There is no doubt that the composition of the atmosphere is changing because of the human activities, and today greenhouse gases are the largest human influence on global climate", wrote Karl, and Trenberth.
"The likely result is more frequent heat waves, droughts, extreme precipitation events, and related impacts, e.g., wildfires, heat stress, vegetation changes, and sea-level rise", they added in a commentary to be published in Friday’s issue of the journal Science.
Karl and Trenberth estimate that, between 1990 and 2100, there is a 90 percent probability that average global temperatures will rise by between 3.1 and 8.9 degrees Fahrenheit (1.7 and 4.9 degrees Celsius) because of human influences on climate.
Such dramatic warming will further melt already crumbling glaciers, inundating coastal areas. Many other groups have already shown that ice in Greenland, the Arctic and Antarctica is melting quickly.
Karl and Trenberth noted that carbon dioxide levels in the atmosphere have risen by 31 percent since preindustrial times.
Carbon dioxide is the No. 1 greenhouse gas, causing warming temperatures by trapping the Sun’s energy in the atmosphere.
Emission of sulfate and soot particles has significant effects too, but more localized, they said.
"Climate change is truly a global issue, one that may prove to be humanity’s greatest challenge", they wrote. "It is very unlikely to be adequately addressed without greatly improved international cooperation and action".
选项
A、Carbon dioxide is the No. 1 greenhouse gas.
B、Emission of sulfate and soot particle has significant global effects.
C、Fight against the pollution won’t win without international cooperation and action.
D、Ice in Greenland, the Arctic and Antarctica is melting quickly.
答案
B
解析
从听力材料我们了解到"Emission of sulfate and soot particle have significant effects too,but more localized,they said".由此可知,硫酸盐及煤烟颗粒的释放对气候也有很大的影响,只不过是更为地方化,而不是全球性的。本题要求选择错误的表述,故答案选项正确。
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