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In the years since the city of London imposed strict

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Re: In the years since the city of London imposed strict [#permalink]

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New post 28 Feb 2011, 14:14
IMO A

Negate A :

Air Pollution is not are NOT ENTIRELY caused by Local industry
--> Air Pollution is PARTIALLY caused by Local industry

So, # of bird species seen could be increased by reducing Air Pollution PARTIALLY by Regulations on Local Industries.

this means by neagting this option, still we could reach the Conclusion,

So we dont need to Assume this.

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New post 28 Feb 2011, 18:46
A.
Nowhere is argument it is mentioned that after regulating on local industry, London became almost completely air pollution free or almost pollution free air is required for increase in the number of bird species. So assumption in option A is not required.

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New post 28 Feb 2011, 21:12
100% A. almost entirely is wrong. A is extreme.

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Re: In the years since the city of London imposed strict [#permalink]

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New post 20 May 2011, 04:07
amod243 wrote:
IMO A
Negate A :
Air Pollution is not are NOT ENTIRELY caused by Local industry
--> Air Pollution is PARTIALLY caused by Local industry
So, # of bird species seen could be increased by reducing Air Pollution PARTIALLY by Regulations on Local Industries.
this means by neagting this option, still we could reach the Conclusion,
So we dont need to Assume this.
Hope this helps

The stimulus in the first statement clearly says that "since the city of London imposed strict air-pollution regulations on local industry". Doesnt this means that Air Pollution came into control due to rules and regulations on "local industry" specifically?
And this is exactly what A says about.

If you say that "--> Air Pollution is PARTIALLY caused by Local industry", then wouldnt it will negate the first statment of the stimulus and destroy the conclusion?
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New post 20 May 2011, 05:02
Its A here.Almost entirely is the word making the choice extreme.
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Re: In the years since the city of London imposed strict [#permalink]

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New post 20 May 2011, 10:02
what is the oa ??
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New post 20 May 2011, 10:32
kamalkicks wrote:
what is the oa ??


OA is A
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In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.
Each of the following is an assumption made in the argument above EXCEPT:
(A) In most major cities, air-pollution problems are caused almost entirely by local industry.
(B) Air-pollution regulations on industry have a significant impact on the quality of the air.
(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.
(D) An increase in the number of bird species in and around a city is desirable.========
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.
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New post 03 Apr 2012, 06:45
All of them look like assumptions to me...
The only possible answer i can think of is D .

Please explain
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New post 03 Apr 2012, 07:01
I feel its A.

What's the OA?

Posted from my mobile device
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New post 03 Apr 2012, 11:32
i think it's D ...OA plz..with explanation

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New post 03 Apr 2012, 17:53
In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.
Each of the following is an assumption made in the argument above EXCEPT:
(A) In most major cities, air-pollution problems are caused almost entirely by local industry.
(B) Air-pollution regulations on industry have a significant impact on the quality of the air.
(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.
(D) An increase in the number of bird species in and around a city is desirable.========
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.

I went for E.
Conclusion: Similar air-pollution rules should be imposed in other major cities.
the conclusion clearly implies that it's desirable to have increase in bird in and around the city. - so I rejected D
A cannot be the answer because if air pollution is not a problem then conclusion wouldn't have been recommended for other cities.

I felt E is the answer because the argument talks about # of bird species seen - doesn't matter whether actual # of species has increased or not; what argument is concerned about is # of bird species seen
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New post 03 Apr 2012, 19:45
I think the answer is D. What is the answer given in the source where you got this question? Please share.

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OA IS A....

Explanation still required...
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New post 06 Apr 2012, 08:45
+1 A

My explanations are the following:

shikhar wrote:
(A) In most major cities, air-pollution problems are caused almost entirely by local industry. - CORRECT: The argument only focuses on the problem of the number of birds. We cannot assume that there are not other air-pollution problems generated by other causes such as cars. (B) Air-pollution regulations on industry have a significant impact on the quality of the air. - The author assumes that there is a causal relationship between the regulations and the quality of air.
(C) The air-pollution problems of other major cities are basically similar to those once suffered by London. - The author must assume that the conditions in other cities are similar to those in London.
(D) An increase in the number of bird species in and around a city is desirable.- The author must assume that the other cities also want a greater number of bird species.
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area. - I agree that this could also be the answer. But A seems better.

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Conclusion : Similar air-pollution rules should be imposed in other major cities.
Premise : the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically

Now Question asks for an option which is no where related to above as an assumption. SO lets drill down each option and strike it out.


(A) In most major cities, air-pollution problems are caused almost entirely by local industry.
-- This passage is concerned with local industry and this can be one probable assumption which fills the gap between premise and COnclusion. So this option is out .....Striked

(B) Air-pollution regulations on industry have a significant impact on the quality of the air.
---- Lets keep it aside for time being.

(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.
--- London regulation outcome has triggered the conclusion. so its must as assumption. so Striked
(D) An increase in the number of bird species in and around a city is desirable.
---- This is the one result of regulation that triggered the implementation in other cities ....Striked
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.
---- This acts as an assumption. If when negated i.e.The increased sightings of bird species in and around London does not reflect an actual increase in the number of species in the area then there won't be any relevance between the premise and conclusion which will lead to fall of conclusion. So its Striked off

Now Option B is remaining ..." Air-pollution regulations on industry have a significant impact on the quality of the air " : This is the correct answer which doesn't act as any assumption for above conclusion to be drawn. Air quality doesn't quantify in the passage conclusion. Negating this i.e. Air-pollution regulations on industry does not have a significant impact on the quality of the air " doesn't affect the premise as the reason can be different for increase in species number and thus doesn't contradict the conclusion too. B doesn't affect the conclusion what so ever

OA is B

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In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.

Each of the following is an assumption made in the argument above EXCEPT:

(A) In most major cities, air-pollution problems are caused almost entirely by local industry.
(B) Air-pollution regulations on industry have a significant impact on the quality of the air.
(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.
(D) An increase in the number of bird species in and around a city is desirable.
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.

I choose E but it's wrong. can S.o help me explain why not E.

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Re: In the years since the city of London [#permalink]

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New post 21 Oct 2012, 05:43
The passage suggests that the number of birds in the city has increased based on the facts that more birds are being seen. But that might not be the case. It may simply be that more of species are flying around than before. But due to the assumption that increased sightings mean increased number of species, the argument holds good.

Although the question would have been more clear had the conclusion been something like,

Similar air-pollution rules should be imposed in other major cities for an increase in the number of bird species.

I would like to know what the source of the question is.
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lvtrung205 wrote:
In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.

Each of the following is an assumption made in the argument above EXCEPT:

(A) In most major cities, air-pollution problems are caused almost entirely by local industry.
(B) Air-pollution regulations on industry have a significant impact on the quality of the air.
(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.
(D) An increase in the number of bird species in and around a city is desirable.
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.

I choose E but it's wrong. can S.o help me explain why not E.


Remember that assumptions fill the gap that exists between the premise(s) and the conclusion. In this question, Premise 1 = London imposed strict air-pollution regs on local industry; Premise 2 = Bird species have increased as a result; and Conclusion = Similar air-pollution rules should be imposed in other major cities. Think about the gap between the conclusion and the premises. What do you have to believe in order for the conclusion (that the rules should be imposed on other cities) to be valid.

A-Do you have to believe that air-pollution is ALMOST ENTIRELY caused by local industry to believe that the helpful regs should be spread to other cities? No, This is an example of the GMAT using very extreme language to invalidate a choice. [In this case the extreme language invalidates an assumption and we are looking for the only non-assumption]
B-We have to believe that regulations impact the air quality or we wouldn't conclude that the regulations should be extended to other cities.
C-We would only conclude to take the same actions in these cities if the problems were similar.
D-We only make this conclusion if we want more birds!
E-We would only recommend (or conclude) to apply these regulations if the results are real/verifiable. If we are seeing more birds because we went to parks instead of looking out our 1st floor window, we can't conclude that these regulations should be spread to other cities. Only if the species actually did increase would we conclude that the regulations are worthy of replication.

A is the only non-assumption in the group (but E is a tempting option).

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New post 23 Oct 2012, 13:12
KyleWiddison wrote:
lvtrung205 wrote:
In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.

Each of the following is an assumption made in the argument above EXCEPT:

(A) In most major cities, air-pollution problems are caused almost entirely by local industry.
(B) Air-pollution regulations on industry have a significant impact on the quality of the air.
(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.
(D) An increase in the number of bird species in and around a city is desirable.
(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.

I choose E but it's wrong. can S.o help me explain why not E.


Remember that assumptions fill the gap that exists between the premise(s) and the conclusion. In this question, Premise 1 = London imposed strict air-pollution regs on local industry; Premise 2 = Bird species have increased as a result; and Conclusion = Similar air-pollution rules should be imposed in other major cities. Think about the gap between the conclusion and the premises. What do you have to believe in order for the conclusion (that the rules should be imposed on other cities) to be valid.

A-Do you have to believe that air-pollution is ALMOST ENTIRELY caused by local industry to believe that the helpful regs should be spread to other cities? No, This is an example of the GMAT using very extreme language to invalidate a choice. [In this case the extreme language invalidates an assumption and we are looking for the only non-assumption]
B-We have to believe that regulations impact the air quality or we wouldn't conclude that the regulations should be extended to other cities.
C-We would only conclude to take the same actions in these cities if the problems were similar.
D-We only make this conclusion if we want more birds!
E-We would only recommend (or conclude) to apply these regulations if the results are real/verifiable. If we are seeing more birds because we went to parks instead of looking out our 1st floor window, we can't conclude that these regulations should be spread to other cities. Only if the species actually did increase would we conclude that the regulations are worthy of replication.

A is the only non-assumption in the group (but E is a tempting option).

KW


I go with E too.

The reason that I didn't choose A is because the author believe that the air-pollution comes from the local industry. Therefore, the city of London set the regulation for local industry to control this problem. This action result in the increase of the number of bird species.

If such 99% of the pollution comes from other sources and the remaining 1% comes from the local industry, the regulation will not work. That's why I think A is an assumption as it shows that the local industry has an enormous impact on the air-pollution.

I'm not quite sure whether my point is correct. Please give me the advice :)

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