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In Western economies, more energy is used to operate

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In Western economies, more energy is used to operate [#permalink] New post 26 Jul 2012, 10:53
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In Western economies, more energy is used to operate buildings than to operate
transportation. Much of the decline in energy consumption since the oil crisis of 1973 is due
to more efficient use of energy in homes and offices. New building technologies, which
make lighting, heating, and ventilation systems more efficient, have cut billions of dollars
from energy bills in the West. Since energy savings from these efficiencies save several
billion dollars per year today, we can conclude that 50 to 100 years from now they will save
more than $200 billion per year (calculated in current dollars). On which one of the
following assumptions does the argument rely?
a) Technology used to make buildings energy efficient will not become prohibitively expensive
over the next century.
b) Another oil crisis will occur in the next 50 to 100 years.
c) Buildings will gradually become a less important consumer of energy than transportation.
d) Energy bills in the West will be $200 billion lower in the next 50 to 100 years.
e) Energy-efficient technologies based on new scientific principles will be introduced in the
next 50 to 100 years.


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[Reveal] Spoiler: OA

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Re: CR - Assumption [#permalink] New post 26 Jul 2012, 13:58
+1 A

If it is impossible to still constructing efficient buildings, we cannot claim that we will save in energy in the future.
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Re: CR - Assumption [#permalink] New post 27 Jul 2012, 07:57
The relation between efficiency of the technology used in buildings and money saved on energy bills is presented.
Hence only if the cost of the technology to make buildings energy efficient does not raise over the next 50 years, would it be safe to say that energy bills would be lot less.

Hence A
Re: CR - Assumption   [#permalink] 27 Jul 2012, 07:57
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