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California Gives Green Light to Space Solar Power
Energy beamed down from space is one step closer to reality, now that California has given the green light to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatt (兆瓦) of power beamed down from solar-power satellites beginning in 2016. But some major challenges will have to be overcome if the technology is to be used widely.
A start-up company called Solaren is designing the satellites, which it says will use radio waves to beam energy down to a receiving station on Earth.
The attraction of collecting solar power in space is the almost uninterrupted sunshine available in eosynchronous (与地球同步的) orbit. Earth-based solar cells, by contrast, can only collect sunlight during daytime and when skies are clear.
But space-based solar power must grapple (努力克服) with the high cost per kilogram of launching things into space, says Richard Schwartz of Purdue U
A. Right
B. Wrong
C. Not mentioned
[填空题]A=Hydro power B=Nuclear power C=Solar power D=Wind power
Which power (power’s) ...
· was developed to provide electricity for satellites at the beginning (71)
· can promote tourism development (72)
· may give off dangerous radioactive pollution into the air (73)
· may affect the downstream water quality and have an impact on plant life (74)
· stations can increase to full power very quickly (75)
· produces small amounts of waste (76)
· is a good method of supplying energy to remote areas (77)
· provides around 20% of the world’s electricity (78)
· can be used to heat your water at home instead of so much gas or electricity
[填空题]Scientists are studying and developing solar power, wind power, and hydroelectric______to replace oil.
[填空题]The use of solar power grew by 60% between the year 2000 and the year 2004.
