Proposal: Carbon dioxide and methane in the atmosphere block : GMAT Critical Reasoning (CR)
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# Proposal: Carbon dioxide and methane in the atmosphere block

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Proposal: Carbon dioxide and methane in the atmosphere block [#permalink]

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14 Dec 2004, 05:39
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Proposal: Carbon dioxide and methane in the atmosphere block the escape of heat into space. So emission of these â€œgreenhouseâ€
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14 Dec 2004, 05:46
Pick D.

We need to counter the objection "methane generates carbon dioxide that is released into the atmosphere".
D says that CO2 is a lesser evil than methane.
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15 Dec 2004, 08:17
Agree with D, good explanations gayathri
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Praveen

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01 Jan 2005, 23:29
gayathri wrote:
Pick D.

We need to counter the objection "methane generates carbon dioxide that is released into the atmosphere".
D says that CO2 is a lesser evil than methane.

Hello, I think choice C is also right.

Could you tell me why not C?

thank you
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02 Jan 2005, 06:03
chunjuwu, C is not a good choice because it does not counter the objection, infact it is in favor of the objection.

The q stem says that "greenhouse" gases are bad because they cause global warming. Methane and CO2 are green house gases.

The objection raised is that by using methane as a fuel, more CO2 ( a greenhouse gas) is released in the atmosphere and hence will lead to global warming. => Do not use methane as a fuel.

C: states that they will replace a fuel which does not release an greenhouse gases such as methane or CO2 with methane which releases CO2. In this case the objection is justified because use of methane will lead to global warming. It does not counter the objection raised.

HTH
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02 Jan 2005, 08:02
gayathri wrote:
chunjuwu, C is not a good choice because it does not counter the objection, infact it is in favor of the objection.

The q stem says that "greenhouse" gases are bad because they cause global warming. Methane and CO2 are green house gases.

The objection raised is that by using methane as a fuel, more CO2 ( a greenhouse gas) is released in the atmosphere and hence will lead to global warming. => Do not use methane as a fuel.

C: states that they will replace a fuel which does not release an greenhouse gases such as methane or CO2 with methane which releases CO2. In this case the objection is justified because use of methane will lead to global warming. It does not counter the objection raised.

HTH

Sorry, I still cannot get it. Could someone help me?

I am supposed the C's meaning is that:
If we don't burn methane to produce electricity, then the methane would
be used as a substitute which orginally decrease the greenhouse level.

In other words, we should burn the methane, or we will deteriorate the atmosphere.

Does it not couter the objection?

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02 Jan 2005, 09:30
chunjuwu wrote:
Sorry, I still cannot get it. Could someone help me?

I am supposed the C's meaning is that:
If we don't burn methane to produce electricity, then the methane would
be used as a substitute which orginally decrease the greenhouse level.

In other words, we should burn the methane, or we will deteriorate the atmosphere.

Does it not couter the objection?

Chunjuwu: Lets look at C again. We know from the objection that Methane releases CO2. Basically, if you use methane as a fuel you are replacing methane with CO2. So, your argument is very valid IF CO2 is better than methane. But if CO2 has the same or worse effect than methane, then you are just replacing methane with a more undesirable gas.

This brings us to statement D which says that CO2 is more desirable when compared to methane. So it counters the objection by saying that though we introduce CO2 in the place of methane, CO2 is less harmful than methane...
VP
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02 Jan 2005, 22:49
gayathri wrote:
chunjuwu wrote:
Sorry, I still cannot get it. Could someone help me?

I am supposed the C's meaning is that:
If we don't burn methane to produce electricity, then the methane would
be used as a substitute which orginally decrease the greenhouse level.

In other words, we should burn the methane, or we will deteriorate the atmosphere.

Does it not couter the objection?

Chunjuwu: Lets look at C again. We know from the objection that Methane releases CO2. Basically, if you use methane as a fuel you are replacing methane with CO2. So, your argument is very valid IF CO2 is better than methane. But if CO2 has the same or worse effect than methane, then you are just replacing methane with a more undesirable gas.

This brings us to statement D which says that CO2 is more desirable when compared to methane. So it counters the objection by saying that though we introduce CO2 in the place of methane, CO2 is less harmful than methane...

Thanks very much , gayathri

I get it now.
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Re: Proposal: Carbon dioxide and methane in the atmosphere block [#permalink]

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03 Oct 2014, 13:36
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Re: Proposal: Carbon dioxide and methane in the atmosphere block   [#permalink] 03 Oct 2014, 13:36
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# Proposal: Carbon dioxide and methane in the atmosphere block

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