Ausubel of Rockefeller University in New York, US. says the key renewable energy sources, including sun, wind and biofuels, would all require vast
1 of land if developed up to large scale production
1 – unlike nuclear power. That land would be far better left alone
2, he says. Renewables look attractive when they are quite
2 . But if we start producing renewable energy on a large scale, the fallout is going to be horrible. Instead, Ausubel argues
3 renewed development of nuclear.
Ausubel draws his conclusions by analysing the amount of energy renewables, natural gas and nuclear can produce in terms of power per square metre of land used
3. Moreover, he claims that as renewable energy use increases, this measure of efficiency
4 will
4 as the best land for wind, biofuels, and solar power gets used up.
Using biofuels to obtain the
5 amount of energy as a 1000 megawatt nuclear power plant would require 2500 square kilometres of farm
6 , Ausubel says. "We should be sparing land for nature
5, not using it as pasture for cars and trucks," he adds.
Solar power is much more efficient than biofuel in terms of the area of land
7 , but it would still require 150 square kilometres of photovoltaic cells to
8 the energy production of the 1000 MW nuclear plant. In another example, he says meeting the 2005 US electricity demand via wind power alone would need 780,000 square kilometres, an area the size of Texas.
However, several experts are highly critical
9 Ausubel’s conclusions. John Turner of the US government’s National Renewable Energy Laboratory says that
10 the US got all of its power from solar energy, it would still need less than half the amount of land that has been paved over for highways. Further, it need not
11 additional land. The US could get a quarter of its energy just from covering rooftops of
12 buildings, he says.
According to Turner, the same "dual use" also applies to wind power
6. "The footprint for wind
7 is only 5% of the land that it
13 . Farmers can still farm the land that the turbines are on
8. Turner says looking solely at land use is an oversimplification of the
14 . "I’m not sure I’d want to build one of these nuclear plants in Afghanistan
9, but we could
15 put in wind and solar power," he adds.
小题1:A. figures B. amounts C, unmbers D. digits
| 小题2: | | A．small | B．huge | C．little | D．vast |
|
| 小题4: | | A．expand | B．minimize | C．enlarge | D．decrease |
|
| 小题5: | | A．same | B．similar | C．alike | D．identical |
|
| 小题6: | | A．region | B．site | C．area | D．land |
|
| 小题7: | | A．leased | B．cultivated | C．used | D．purchased |
|
| 小题8: | | A．patch | B．match | C．catch | D．fetch |
|
| 小题10: | | A．even if | B．only if | C．what if | D．as if |
|
| 小题11: | | A．lock up | B．take up | C．give up | D．set up |
|
| 小题12: | | A．towering | B．interesting | C．nice-looking | D．existing |
|
| 小题13: | | A．surrounds | B．contains | C．includes | D．covers |
|
| 小题14: | | A．issue | B．stuff | C．summary | D．suggestion |
|
| 小题15: | | A．doubtfully | B．supposedly | C．certainly | D．honestly |
|
e group.In a beehive there live three kinds of bees:the queen bee，the male bees and the worker bees.The worker bees are born to be hard-working，flying from flower to flower collecting nectar（花蜜），which is made up mostly of sugar mixed with water.Bees draw this nectar into their honey bags where some sort of liquid in their bodies turns the nectar into honey.The newly made honey flows slowly from the bees’ underside and then is stored in small cells in the hive.When the weather turns cold，and there are no flowers for them to collect nectar，the stored honey will see them through the winter months.People who raise bees and depend on bees for a living are thought of as beekeepers.A bee-keeper usually keeps hundreds of hives，and removes honey from hives and keeps it in glass bottles or jars.Honey usually appears as a clear golden-colored liquid，but this lie
s in the sort of flowers from which bees have taken the nectar.
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