When the supply of a given resource dwindles, alternative : GMAT Critical Reasoning (CR)
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# When the supply of a given resource dwindles, alternative

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Senior Manager
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When the supply of a given resource dwindles, alternative [#permalink]

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11 Feb 2007, 21:29
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When the supply of a given resource dwindles, alternative technologies allowing the use of different resources develop, and demand for the resource that was in short supply naturally declines. Then the existing supplies of that resource satisfy whatever demand remains. Among the once-dwindling resources that are now in more than adequate supply are flint for arrowheads, trees usable for schooner masts, and good mules. Because new technologies constantly replace old ones, we can never run out of important natural resources.
Which one of the following, if true, most seriously undermines the conclusion?
(A) The masts and hulls of some sailing ships built today are still made of wood.
(B) There are considerably fewer mules today than there were 100 years ago.
(C) The cost of some new technologies is often so high that the companies developing them might actually lose money at first.
(D) Dwindling supplies of a natural resource often result in that resourceâ€™s costing more to use.
(E) The biological requirements for substances like clean air and clean water are unaffected by technological change.
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11 Feb 2007, 21:41
Resources do not always refer to physical or material resources. Even air and water are natural resources. If air and water dwindle, and there is no technology to artificially create them, then we will run out of them.

E says precisely this.

(E) The biological requirements for substances like clean air and clean water are unaffected by technological change.

The word 'unaffected' means that technology cannot provide alternate resources for air and water.
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11 Feb 2007, 22:01
I would go with E.
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13 Feb 2007, 21:20
OA is E
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