Solar thermal is expensive compared with wind energy and fuels. But it does have advantages. Power from the desert sun is more reliable than wind power during the day. And unlike fuels, it has no greenhouse gases.
And solar thermal is growing globally. A white paper says that by 2040 solar power could satisfy more than 5 percent of the world's electricity demand. The best places for it are Australia, the United States, Spain, the Middle East and North Africa, which could export power from the sun to Europe on high-tech power lines.
40. How many factors does the passage mention which affect the development of solar thermal power?
A. One. B. Two.
C. Three. D. Four.
41. The underlined word soar ( in Paragraph 2 ) means ________.
A. dropped B. disappeared
C. limited D. increased
42. The passage mentioned Solargenix in order to show that _________.
A. limits on greenhouse gases can encourage new technologies
B. it will need lots of money to build Solargenix
C. Solargenix was a newly-built plant
D. the solar thermal power has its own promising future
43. According to the passage, which of the following energy supplies is more reliable and renewable during the day?
A. Wind. B. Oil.
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