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Carbon pollution from the burning of fossil fuels

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Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 18 Feb 2018, 11:12
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Question Stats:

59% (01:47) correct 41% (01:53) wrong based on 366 sessions

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Carbon pollution from the burning of fossil fuels has contributed to the warming of the planet, which has melted ice in the Arctic Circle and unearthed caves and waterways that were previously inaccessible due to ice. Scientists researching these areas have found stores of carbon that had been trapped in the permafrost of these caves, and that are now being spread into the atmosphere by bacteria as the permafrost melts.

Which of the following can best be concluded by the information above?

a) The rate at which carbon is being released into the atmosphere is increasing.

b) Previously frozen carbon from permafrost will someday pose more of a threat to the environment than the carbon released from the burning of fossil fuels.

c) The amount of carbon being released into the atmosphere cannot be determined simply by calculating the amount of fossil fuel being burned.

d) The amount of carbon released into the atmosphere will increase until humans stop burning fossil fuels.

e) The amount of carbon released into the atmosphere from melting permafrost is about equal to the amount released from the burning of fossil fuels.​

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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 18 Feb 2018, 14:25
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sahilvijay wrote:
Carbon pollution from the burning of fossil fuels has contributed to the warming of the planet, which has melted ice in the Arctic Circle and unearthed caves and waterways that were previously inaccessible due to ice. Scientists researching these areas have found stores of carbon that had been trapped in the permafrost of these caves, and that are now being spread into the atmosphere by bacteria as the permafrost melts.

Which of the following can best be concluded by the information above?

a) The rate at which carbon is being released into the atmosphere is increasing.

b) Previously frozen carbon from permafrost will someday pose more of a threat to the environment than the carbon released from the burning of fossil fuels.

c) The amount of carbon being released into the atmosphere cannot be determined simply by calculating the amount of fossil fuel being burned.

d) The amount of carbon released into the atmosphere will increase until humans stop burning fossil fuels.

e) The amount of carbon released into the atmosphere from melting permafrost is about equal to the amount released from the burning of fossil fuels.​


IMO OA is C. (In my case, I need over 3 minites to solve this..)
Because there is a mention that 'Scientists researching these areas have found stores of carbon that had been trapped in the permafrost of these caves, and that are now being spread into the atmosphere by bacteria as the permafrost melts.'
It means that another carbon can happened by burning of fossil fuels.


a) The rate at which carbon is being released into the atmosphere is increasing.
-> Possible but there is no mention about 'stores of carbon that had been trapped in the permafrost of these caves'
b) Previously frozen carbon from permafrost will someday pose more of a threat to the environment than the carbon released from the burning of fossil fuels.
-> We cannot know about 'more'!!
In my case, the word 'Bacteria' makes me confusing about B..I need almost 1 minutes to remove B..
c) The amount of carbon being released into the atmosphere cannot be determined simply by calculating the amount of fossil fuel being burned.
-> Correct.
d) The amount of carbon released into the atmosphere will increase until humans stop burning fossil fuels.
-> Cannot know about this using the passage.
e) The amount of carbon released into the atmosphere from melting permafrost is about equal to the amount released from the burning of fossil fuels.​
-> Cannot know about this using the passage.
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 19 Feb 2018, 16:12
C doesn't make sense, as we don't know, maybe it's possible to calculate the release of carbon dioxide.
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 19 Feb 2018, 22:01
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C is correct because burning fossil fuels is not the only source of carbon entering the atmosphere. The prompt mentions that some additional carbon is being released when permafrost melts away.
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 20 Feb 2018, 09:00
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alexmonnin wrote:
C is correct because burning fossil fuels is not the only source of carbon entering the atmosphere. The prompt mentions that some additional carbon is being released when permafrost melts away.

I get it, but it doesn't mention anywhere that we cannot calculate it. So we can't draw a definite conclusion.
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Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 20 Feb 2018, 09:40
amount of carbon released into the atmosphere = amount of fossil fuels being burned + amount of carbon released by melted permafrost

In other words, z = x + y

Answer C states that we cannot cannot determine z if we only know x. Therefore, this is most definitely a true statement.

It is not directly stated in the passage because it is asking YOU to draw the conclusion. It is not asking you to REPEAT the conclusion.
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 22 Feb 2018, 18:29
Why A is not the correct answer?

The last statement says that the carbon is being released by bacteria as the permafrost melts. Doesn't this imply that the rate of carbon is increasing?
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 22 Feb 2018, 18:54
harsh2112 wrote:
Why A is not the correct answer?

The last statement says that the carbon is being released by bacteria as the permafrost melts. Doesn't this imply that the rate of carbon is increasing?


That would be a very likely implication but we do not know that for a fact. A conclusion question must be true no matter what. The stimulus does not mention anything about the rate of carbon being released so we cannot assume that it is increasing.
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 23 Feb 2018, 00:55
alexmonnin wrote:
harsh2112 wrote:
Why A is not the correct answer?

The last statement says that the carbon is being released by bacteria as the permafrost melts. Doesn't this imply that the rate of carbon is increasing?


That would be a very likely implication but we do not know that for a fact. A conclusion question must be true no matter what. The stimulus does not mention anything about the rate of carbon being released so we cannot assume that it is increasing.

Last statement is stating the carbon is spreading that means it is increasing...still not able to conclude why A is not correct

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Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 23 Feb 2018, 05:02
harsh2112 wrote:
Why A is not the correct answer?

The last statement says that the carbon is being released by bacteria as the permafrost melts. Doesn't this imply that the rate of carbon is increasing?



Option A is a trap answer.
Statement mentions that rate is increasing , maybe amount of Carbon is increasing but how do we know if rate is also increasing.
Hope this helps :)
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 23 Feb 2018, 08:37
adiverma wrote:
alexmonnin wrote:
harsh2112 wrote:
Why A is not the correct answer?

The last statement says that the carbon is being released by bacteria as the permafrost melts. Doesn't this imply that the rate of carbon is increasing?


That would be a very likely implication but we do not know that for a fact. A conclusion question must be true no matter what. The stimulus does not mention anything about the rate of carbon being released so we cannot assume that it is increasing.

Last statement is stating the carbon is spreading that means it is increasing...still not able to conclude why A is not correct

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That is not necessarily true. From the stimulus we know that the amount of carbon being released is equal to the amount of fossil fuels burned AND the amount released from the permafrost. Lets do a hypothetical situation.

Last year the amount released from the burning of fossil fuels was 100g/day and nothing was released from the permafrost. This is a total of 100g/day.

This year, the amount of carbon being released has dropped to 50g/day but the permafrost is releasing 25g/day. This is a total of 75g/day.

In this scenario the rate actually decreased. If the stimulus stated that the amount of carbon being released by the burning of fossil fuels DID NOT DECREASE, then A would be correct.
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Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 05 Mar 2018, 19:08

VERITAS PREP OFFICIAL SOLUTION:



With Inference questions, the correct answer must meet the "must be true" standard, which means that you should attack each answer choice via process-of-elimination. Also note that when you have prior knowledge of the subject matter of a question and/or when you have a strong opinion about a topic (as many do with topics such as the environment), you must take care to avoid "mental inertia" - you can only decide on an answer choice based on what is explicitly given in the stimulus.

With choice A, pay attention to the specific wording that the "rate at which carbon is being released" is increasing (NOT "the amount of carbon is increasing"). While it might seem likely that the addition of a new source of carbon would increase the rate, you cannot prove this from the information given (what if a combination of more fuel-efficient vehicles and fewer people driving has dramatically cut down auto emissions by more than the newly unfrozen carbon is being released?).

With choice B, you can use similar logic: you just don't know how much carbon is in the permafrost (at least not from the stimulus) and you cannot rule out a massive surge in the burning of fossil fuels. (Also note - predictions far into the future are really hard to prove. What if an asteroid blows the whole planet up next week? Even if the trend were heading in this direction, that would render the prediction untrue!)

Choice C is correct: the stimulus proves that now there is (at least) a second source of carbon emissions, so calculating the amount from just one of those sources will not give an accurate statistic.

Choice D doesn't have to be true (what if someone invents a "carbon vacuum" to clean the air?). And choice E is also incorrect - you know now that there are two sources of carbon, but do not have nearly enough information to declare that the two sources are equal in the amount of carbon they release.
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Re: Carbon pollution from the burning of fossil fuels  [#permalink]

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New post 18 May 2018, 07:18
Good Question.

C is the required Answer here.
As the level of Carbon pollution in atmosphere is equal to the sum of burning of fossil fuel and Carbon that had been trapped in the permafrosts.So, the amount of carbon being released into the atmosphere cannot be determined simply by calculating the amount of fossil fuel being burned.

+1 if this helps!

sahilvijay wrote:
Carbon pollution from the burning of fossil fuels has contributed to the warming of the planet, which has melted ice in the Arctic Circle and unearthed caves and waterways that were previously inaccessible due to ice. Scientists researching these areas have found stores of carbon that had been trapped in the permafrost of these caves, and that are now being spread into the atmosphere by bacteria as the permafrost melts.

Which of the following can best be concluded by the information above?

a) The rate at which carbon is being released into the atmosphere is increasing.

b) Previously frozen carbon from permafrost will someday pose more of a threat to the environment than the carbon released from the burning of fossil fuels.

c) The amount of carbon being released into the atmosphere cannot be determined simply by calculating the amount of fossil fuel being burned.

d) The amount of carbon released into the atmosphere will increase until humans stop burning fossil fuels.

e) The amount of carbon released into the atmosphere from melting permafrost is about equal to the amount released from the burning of fossil fuels.​

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Re: Carbon pollution from the burning of fossil fuels &nbs [#permalink] 18 May 2018, 07:18
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