The Effects of Global Warming on Weather
There are hidden factors which scientists call "feedback mechanisms”。 No one knows quite how they will interact with the changing 's one example： plants and animals adapt to climate change over the current estimate of half a degree centigrade of warming per decade,vegetation (植物) may not keep atologist James Hansen predicts climate zones will shift toward the poles by 50 to 75 kilometres a year—faster than trees can naturally ies that find themselves in an unfamiliar environment will 1000-kilometer-wide strip of forest running through Canada,the USSR and Scandinavia could be cut by ions of dying trees would soon lead to massive forest fires,releasing tons of CO2 and further boosting global warming.
There are dozens of other possible "feedback mechanism”。 Higher temperatures will fuel condensation and increase cloudiness,which may actually damp down global rs,like the "albedo"effect,will do the "albedo"effect is the amount of solar energy reflected by the earth's northern ice and snow melts and the darker sea and land pokes (戳) through,more heat will be absorbed,adding to the global temperature increase.
Even if we were to magically stop all greenhouse-gas emissions tomorrow the impact on global climate would continue for y will simply make the problem fact is that some of us are doing quite well the way things developed world prosperity has been built on 150 years of cheap fossil fuels.
Material progress has been linked to energy y 75 percent of all the world's energy is consumed by a quarter of the world's average rich-world resident adds about 3.2 tons of CO2 yearly to the atmosphere,more than four times the level added by each Third World US,with just seven per cent of the global population,is responsible for 22 per cent of global warming.
41."Feedback mechanisms"in paragraph 1 most probably refer to ____________.
plants and animals adapt to hidden factors
plants and animals interact with the changing climate
climate changes
climate zones shift
can learn from the passage that ____________.
feedback mechanisms may slow down global warming
basic facts of global warming are unknown
loping countries benefit from cheap fossil fuels
loped countries have decided to reduce their energy consumption
s Hansen predicts that the shift of climate zones will be accompanied by ____________.
cutting of many trees
rable environmental changes
essful migration of species
ccessful migration of trees
can be inferred from the passage that ____________.
developing world has decided to increase its energy consumption
B.a third-world citizen adds less than a ton of CO2 yearly to the atmosphere
world climate would soon gain its balance if we stopped greenhouse gas emissions
re prosperity of the world is dependent on cheap fossil fuels
h of the following is the main topic of the passage?____________
ct of global warming on climate.
perity and cheap fossil fuels.
rial progress and energy consumption.
ts and animals in the changing climate.
參考答案：
41.B 第一段中的“feedback mechanisms”的意思最可能是：A動植物是如何適應隱蔽因素的;B動植物是如何與不斷變化的氣候相互作用的`;C氣候是如何變化的;D氣候帶是如何遷移的。
42.A 從文章中我們可以得知：A某些反饋機制可能減緩全球變暖的速度;B全球變暖的基本事實還不為人所知;C發展中國家從廉價的礦物燃料中獲益;D發達國家打算降低能耗。
43.D 預測氣候帶的遷移將由下列哪一項伴隨進行?A許多樹木被砍伐;B有利的環境變化;C物種的成功遷移;D樹木的不成功遷移。
44.B 從文章可以推斷出：A發展中國家打算增加能源的消耗;B第三世界每年向大氣層釋放的二氧化碳，人均不超過一噸;C如果我們停止排放引起溫室效應的廢氣，全球的氣候就會獲得平衡;D未來世界的繁榮靠廉價的礦物能源。
45.A 本篇文章的主題是：A全球變暖給氣候帶來的影響;B繁榮與廉價的礦物能源;C物質進步與能源消耗;D氣候變化過程中的動植物。
