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The large amounts of carbon dioxide now being released into

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Senior Manager
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The large amounts of carbon dioxide now being released into [#permalink]

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New post 19 Mar 2009, 06:02
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A
B
C
D
E

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The large amounts of carbon dioxide now being released into the atmosphere by the burning of fossil fuels will not, in fact, result in a greenhouse effect—an increase in average global temperatures. Since plants use carbon dioxide in larger quantities if the supply is increased, they are able to grow larger and multiply more vigorously, and atmospheric carbon dioxide concentrations will eventually become stable.
Which of the following, if true, would most seriously weaken the conclusion that a greenhouse effect will not result from the current release of large amounts of carbon dioxide into the atmosphere?


A. The expected rise in average global
temperatures has not yet been
observed.
B. Ocean waters absorb carbon dioxide
at a greater rate when the
atmospheric concentration of carbon
dioxide is higher.
C. Since the beginning of the industrial
Revolution, increased atmospheric
concentrations of carbon dioxide
have resulted in improved
agricultural productivity.
D. When plants decay, they produce
methane, another gas that can have
a marked greenhouse effect.
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rampuria


Last edited by rampuria on 19 Mar 2009, 08:13, edited 1 time in total.

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CR-Co2 [#permalink]

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New post 19 Mar 2009, 08:11
Its a CR Q---- :P


The large amounts of carbon dioxide now being released into the atmosphere by the burning of fossil fuels will not, in fact, result in a greenhouse effect—an increase in average global temperatures. Since plants use carbon dioxide in larger quantities if the supply is increased, they are able to grow larger and multiply more vigorously, and atmospheric carbon dioxide concentrations will eventually become stable.
Which of the following, if true, would most seriously weaken the conclusion that a greenhouse effect will not result from the current release of large amounts of carbon dioxide into the atmosphere?


A. The expected rise in average global
temperatures has not yet been
observed.
B. Ocean waters absorb carbon dioxide
at a greater rate when the
atmospheric concentration of carbon
dioxide is higher.
C. Since the beginning of the industrial
Revolution, increased atmospheric
concentrations of carbon dioxide
have resulted in improved
agricultural productivity.
D. When plants decay, they produce
methane, another gas that can have
a marked greenhouse effect.
_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

Kudos [?]: 732 [0], given: 17

Director
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Joined: 04 Jan 2008
Posts: 896

Kudos [?]: 732 [0], given: 17

Re: CR Co2 [#permalink]

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New post 19 Mar 2009, 08:27
Why there is no E?

anyway, its a lovely Q

Conclusion is : plants use carbon dioxide in larger quantities if the supply is increased, they are able to grow larger and multiply more vigorously, and atmospheric carbon dioxide concentrations will eventually become stable.

A & B are OOS(out of Scope)

C deals with Ocean
Only D Weakens it
============
_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

Kudos [?]: 732 [0], given: 17

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Re: CR Co2 [#permalink]

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New post 19 Mar 2009, 13:28
nitya34 wrote:
Why there is no E?

anyway, its a lovely Q

Conclusion is : plants use carbon dioxide in larger quantities if the supply is increased, they are able to grow larger and multiply more vigorously, and atmospheric carbon dioxide concentrations will eventually become stable.

A & B are OOS(out of Scope)

C deals with Ocean
Only D Weakens it
============


Agree with D and Nitya's explanation.

Kudos [?]: 53 [0], given: 0

Re: CR Co2   [#permalink] 19 Mar 2009, 13:28
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