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Geothermal power plants produce power using heat from underground reservoirs of hot water or steam heated by the surrounding rock. ██ ███ ███████ █████ ██ ███ █████ █████ ████ ███████████ ███ █████ ███ █████ ███ █████████ ██ ███████ ██ █████████ ██████████ █████ ██████ ███████ █████ ████ ████████████ ████ █████████████ ██████ ████ █████ ███████ ████████ █████████ ███████ ████ ██ ███ ████ ██████ ██████████ █████ ████ ██████████ █████ ██████ ████ ██ █████████ ██ ████ ██████
Summary
The advocates claim that in the near future, in most areas, it will be possible to get cost-effective power from geothermal power plants.
We don’t get any direct support for the advocates’ claim, but we are told that in areas of the world in which underground hot water and steam can be reached by drilling, geothermal power plants produce power more cost effectively than convention power plants do.
Notable Assumptions
Why should we believe that “in the near future” geothermal plants can provide economical power in “most areas”? It probably has something to do with the fact that in areas where underground hot water and steam can be reached by drilling, geothermal plants are more economical than conventional plants.
If, in the near future, most areas will allow for underground hot water and steam to be reached by drilling, then the advocates’ claim is strengthened.
7.
Which one of the following, ██ █████ ████ █████ ██ ███████ ███ ██████████ ███████████
a
Conventional power plants, ██████ ██████████ █████ ███████ ███████ █████ ███████ ██ ██████████ ████ ███ ████
b
A typical geothermal █████ █████ ████████ ██ █████ ██ ████ ██████ ██ █ ███████ ████████████ █████ ██████
c
The high start-up █████ ██ ██████████ █████ ██████ ███████████ █████ ████████████ ████ ██ █████████ █████ ████ ███ ████ ██████████ ████ ████████████ █████ ██████ ██ ███ ████ ████
d
Advanced drilling technology ██ █████ █████████ ████ ████ ████ ████ ██ ████ ████████ ███ ██████████ ██ █████ █████ ████ █████ ██████ ████ ██ ██ █████████ ████████ ██ ██████
e
Recent research has ███ ██ ███████████ ████ █████ █████████████ █████ ██████████ █████ ███ ██████ ███ █████ ██ █████ ███████