Older United States automobiles have been identified as : GMAT Critical Reasoning (CR)
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# Older United States automobiles have been identified as

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Older United States automobiles have been identified as [#permalink]

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08 Mar 2008, 07:19
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Older United States automobiles have been identified as contributing disproportionately to global air pollution. The requirement in many jurisdictions that automobiles pass emission-control inspections has had the effect of taking many such automobiles out of service in the United States, as they fail inspection and their owners opt to buy newer automobiles. Thus the burden of pollution such older United States automobiles contribute to the global atmosphere will be gradually reduced over the next decade.

Which one of the following, if true, most seriously weakens the argument?

(A) It is impossible to separate the air of one country or jurisdiction from that of others.
(B) When automobiles that are now new become older, they will, because of a design change, cause less air pollution than older automobiles do now.
(C) There is a thriving market for used older Untied States automobiles that are exported to regions that have no emission-control regulations.
(D) The number of jurisdictions in the United States requiring automobiles to pass emission-control inspections is no longer increasing.
(E) Even if all the older automobiles in the United States were retired from service, air pollution from United States automobiles could still increase if the total number of automobiles in use should increase significantly.
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Re: cr 8 lsat 4 section III - weaken [#permalink]

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08 Mar 2008, 08:58
Thus the burden of pollution such older United States automobiles contribute to the [color=#804000]global atmosphere will be gradually reduced over the next decade[/color].

Thus we need to look for statement where it shows, pollution from any other geo
Which one of the following, if true, most seriously weakens the argument?

(A) It is impossible to separate the air of one country or jurisdiction from that of others.-irrelevant, eliminate
(B) When automobiles that are now new become older, they will, because of a design change, cause less air pollution than older automobiles do now.-> irrelevant, eliminate it

(C) There is a thriving market for used older Untied States automobiles that are exported to regions that have no emission-control regulations.-> the vehicles will continue to pollute from a different country, sounds good, hold it!

(D) The number of jurisdictions in the United States requiring automobiles to pass emission-control inspections is no longer increasing.->irrelevant, eliminate it

(E) Even if all the older automobiles in the United States were retired from service, air pollution from United States automobiles could still increase if the total number of automobiles in use should increase significantly.->irrelevant, eliminate it.

Thus C
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Re: cr 8 lsat 4 section III - weaken [#permalink]

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08 Mar 2008, 12:19
Option E seems correct.

If number of car increases, air pollution will continue to rise even if older cars retire .
This weekens the conclusion.
I do not understand how is this irrelevant.

Option C is quite close .
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Re: cr 8 lsat 4 section III - weaken [#permalink]

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08 Mar 2008, 12:31
I will go with C.

(A) It is impossible to separate the air of one country or jurisdiction from that of others.-irrelevant, eliminate.
Main topic does talk about global phenomenon, but it does not talk about jurisdiction in other countires.

(B) When automobiles that are now new become older, they will, because of a design change, cause less air pollution than older automobiles do now
If true, this will strenthen the argument rather than weaking it so eliminate it.

(C) There is a thriving market for used older Untied States automobiles that are exported to regions that have no emission-control regulations.
Seems good. As although vechiles were taken off the US roads but if they are used in some other countries, then these old vechiles will continue to add to global pollution. So taking off from US road is not helping to ease off the pollution.

(D) The number of jurisdictions in the United States requiring automobiles to pass emission-control inspections is no longer increasing.
Number of jurisdiction has nothing to do with emission control. It may be already the case that whole of US is covered by these jurisdictions so there is no need to increase the jurisdictions.

(E) Even if all the older automobiles in the United States were retired from service, air pollution from United States automobiles could still increase if the total number of automobiles in use should increase significantly.
Seems good, however as newer vechiles may be technologically advance and may contribute very less compared to old vechile so increased number may not add upto the pollution. So it can be ruled out.
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Re: cr 8 lsat 4 section III - weaken [#permalink]

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09 Mar 2008, 07:47
I would go for C.
Actually E is close too. But it has got a hole. Even if the number of vehicles is increased, they may make less pollution if designed good.
In GMAT, answer should be airtight. So E looses the race.
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Re: cr 8 lsat 4 section III - weaken [#permalink]

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09 Mar 2008, 07:58
C it is.
We are talking about global pollution..so if those cars are still used somewhere ..means we are still polluting the globe...
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Re: cr 8 lsat 4 section III - weaken [#permalink]

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19 Apr 2012, 07:08
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dynamo wrote:
Option E seems correct.

If number of car increases, air pollution will continue to rise even if older cars retire .
This weekens the conclusion.
I do not understand how is this irrelevant.

Option C is quite close .

Pay close attention to what the conclusion is stating: Thus the burden of pollution such older United States automobiles contribute to the global atmosphere will be gradually reduced over the next decade.

(C) There is a thriving market for used older Untied States automobiles that are exported to regions that have no emission-control regulations.

(E) Even if all the older automobiles in the United States were retired from service, air pollution from United States automobiles could still increase if the total number of automobiles in use should increase significantly.

The conclusion is only concerned with the older cars contributing to global pollution,, NOT the total of number of vehicles rising in the future. This is a classic GMAT out-of-scope answer choice that does not directly attack the conclusion but rather entice you by using the wording "pollution...should increase significantly", which at first glance seems to weaken part of the wording stated in the conclusion: "pollution...will be gradually reduced"
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Re: Older United States automobiles have been identified as [#permalink]

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24 Oct 2012, 14:51
E is actually relevant to the conclusion: after all, if E is actually true, it could undermine the conclusion.

However, the problem with E is due to the conditional language: it says if number of older car increases, then pollution will increase. Well,
does the stimulus actually say that number of older car is increasing? Nope.
Thus, E is wrong because it requires additional assumption, that the number is car is increasing.

C, on the other hand, is just a clear-cut answer, requiring no additional assumption: the stimulus says that older car contributes to air pollution and if they are sold to markets where there is no test, then yes, decrease in air pollution won't seem likely.
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Re: Older United States automobiles have been identified as [#permalink]

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19 Apr 2013, 15:49
marcodonzelli wrote:
Older United States automobiles have been identified as contributing disproportionately to global air pollution. The requirement in many jurisdictions that automobiles pass emission-control inspections has had the effect of taking many such automobiles out of service in the United States, as they fail inspection and their owners opt to buy newer automobiles. Thus the burden of pollution such older United States automobiles contribute to the global atmosphere will be gradually reduced over the next decade.

Which one of the following, if true, most seriously weakens the argument?

(A) It is impossible to separate the air of one country or jurisdiction from that of others.
(B) When automobiles that are now new become older, they will, because of a design change, cause less air pollution than older automobiles do now.
(C) There is a thriving market for used older Untied States automobiles that are exported to regions that have no emission-control regulations.
(D) The number of jurisdictions in the United States requiring automobiles to pass emission-control inspections is no longer increasing.
(E) Even if all the older automobiles in the United States were retired from service, air pollution from United States automobiles could still increase if the total number of automobiles in use should increase significantly.

Global pollution will not be reduced if the older US automobiles are still working.
C states that older automobiles are not discarded, but are moved to other countries.
Hence C is correct.
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Re: Older United States automobiles have been identified as [#permalink]

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31 Oct 2013, 20:31
E is trap (it is actually irrelevant) The argument clearly talks about older automobiles contribution to the global atmosphere. E mentions new automobiles contribution which is not what we are looking for over here. Hence C.
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Re: Older United States automobiles have been identified as [#permalink]

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25 Aug 2016, 21:45
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Older United States automobiles have been identified as   [#permalink] 25 Aug 2016, 21:45
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