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Scientists are discussing ways to remove excess carbon dioxide from

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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 22 Sep 2014, 22:36
souvik101990 wrote:
Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life. One plan to accomplish this is to establish giant floating seaweed farms in the oceans. When the seaweed plants die, they will be disposed of by being burned for fuel.

Which of the following, if true, would indicate the most serious weakness in the plan above?

A. Some areas of ocean in the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms.

B. When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime.

C. Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel.

D. Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life.

E. Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel.


The main idea of the scientists is to remove excess carbon dioxide from atmosphere.This is achieved by establishing giant seaweed farms in oceans.Later, that seaweed will be burnt for fuel. A statement can weakened the argument if it is hurting the main idea i.e if it is not able to reduce the carbon dioxide.
A. Some areas of oceanin the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms.
Incorrect. We do not care if some areas do not contain sufficient nutrients, there are many areas which can.The seaweed can still grow and reduce the co2.
B. When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime.
CORRECT.As it is mentioned that the sea weed will be burned for fuel, The co2 it releases will be compared to amount it absorbed , so, in all the total CO2 will not reduce and be the same.
C. Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel.
Incorrect. Beyond the scope of argument.
D. Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life.
Incorrect.It doesn't matter how much is released, The idea is to remove excess CO2.We may think that billion ton might be big amount but the statement doesn't relate what explain what excess is ? It might be trillion ton.
E. Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel.
Incorrect. Beyond the scope.We dont really care who does what with seaweed.
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 23 Sep 2014, 00:28
B for me too. If it releases an equivalent amount of CO2 when burned, the plan is of no use!
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 23 Sep 2014, 02:53
My choice is B, seems quite clear but will explain.

Read the paragraph slowly and understand it. You need to understand the argument then you should know right away we were going to weaken the last sentence in the argument. If we can change the amount of carbon dioxide the plants take in then the whole argument is weakened. Or in this case the amount they take is is sent back into the air the plants have done nothing to reduce carbon dioxide in the air.

A. its irrelevant we do not care about the southern hemisphere plan and simple!

B. Correct, if any carbon dioxide the plant takes in is put back into the air nothing has happened and we mine as well not have the plants!

C. Does not weaken the sentence people may or may not use them no direct result on the argument.
D. This actually strengthens the argument because it still reduces the amount of carbon dioxide in the air 7-5=2 now, before its 7-0=7
E. Irrelevant again as we do not care about the amount of money the plants are making!


Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life. One plan to accomplish this is to establish giant floating seaweed farms in the oceans. When the seaweed plants die, they will be disposed of by being burned for fuel.

Which of the following, if true, would indicate the most serious weakness in the plan above?

A. Some areas of ocean in the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms.

B. When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime.

C. Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel.

D. Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life.

E. Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel.

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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 23 Sep 2014, 03:22
+1 for B
The plan is to remove the excess carbon dioxide from the atmosphere.
If seaweeds produce the same amount of Carbon dioxide what they consumed during their lifetime.
Then the plan is certainly not going to work.
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 05 Oct 2014, 11:21
The OA is wrong here. The correct answer is B.
E is OFS.
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 05 Oct 2014, 21:43
The OA was changed per request. As the result the Timer Stats is completely out of whack.

Thanks!
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 07 Oct 2014, 15:25
Answer is certainly B.

We're talking about reducing excess CO2 emissions by increasing the amount that seaweed plants can absorb. So, if burning them after they die creates as much CO2 as they've absorbed in their lifetime, we're basically defeating the purpose!
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 14 Jul 2017, 08:46
Conclusion : Plan to remove excess CO2 through seaweed will succeed.
Missing info : Effects of Burning dead seaweed plant on the amount of CO2 in the atmosphere

(A) Some areas of ocean in the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms.
Okay so some area of ocean won’t support seaweeds but we can always look for areas which will support.
Does NOT harm our argument and its conclusion.

(B) When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime.
Perfect answer. In line with our thinking.

(C) Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel.
Use of seaweed as a fuel is not the issue. And anyways if some people will be reluctant, then other who are not will switch and consume the same.

(D) Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life.
Irrelevant. How much excess is the CO2 in the atmosphere is NOT the issue in the argument.

(E) Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel.
Irrelevant. The plan is not to make money but to remove the excess CO2 from the atmosphere.
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 15 Jul 2017, 09:42
Merged topics. Please, search before posting questions!
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Re: Scientists are discussing ways to remove excess carbon dioxide from  [#permalink]

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New post 16 Jul 2017, 05:19
Imo B
It gives us the flaw inherent in the argument.
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New post 22 Jan 2019, 04:21
agree with B for GMAT.
But if we bring common sence into answering this question for actual worls scenario, wouldnt CO2 produced from seeweed as a fuel = recycling.
Instead of using other sources of fuel which produce CO2, if we use seeweed, it will absorb equal amount of CO2 produced during its combusion. So alltogether reducing the amount of CO2. :)
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Re: Scientists are discussing ways to remove excess carbon dioxide from   [#permalink] 22 Jan 2019, 04:21

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