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# Global ecological problems reduce to the problem of balancing supply a

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Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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10 Mar 2019, 09:32
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Global ecological problems reduce to the problem of balancing supply and demand. Supply is strictly confined by the earth’s limitations. Demand, however, is essentially unlimited, as there are no limits on the potential demands made by humans. The natural tendency for there to be an imbalance between demand and sustainable supply is the source of these global problems. Therefore, any solutions require reducing current human demand.

Which one of the following is an assumption on which the argument depends?

(A) Supply and demand tend to balance themselves in the long run.
(B) It is possible to determine the limitations of the earth’s sustainable supply.
(C) Actual human demand exceeds the earth’s sustainable supply.
(D) It is never possible to achieve a balance between the environmental supply and human demand.
(E) Human consumption does not decrease the environmental supply.

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Re: Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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10 Mar 2019, 10:56
IMO C. Because the conclusion is that in order to maintain a balance (i.e., any solutions) require reducing current human demand. This implicitly states that current human demand exceeds the earth’s sustainable supply.

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Re: Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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10 Mar 2019, 11:35

The conclusion is that solution should REQUIRE lowering human demands.

Negating Option E tells that consumption actually reduces supply .. so we have a problem at supply itself. Because even if we reduce demands the balance won't come through

Option C just repeats already what is mentioned in the argument.

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Re: Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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10 Mar 2019, 17:01
I think it is B. In order to reduce demand, you would have first to know what the current earth supply is. Therefore, it should be "possible to determine the limitations of the earth’s sustainable supply". (B)
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Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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Updated on: 10 Mar 2019, 18:25
IMO C.

What is important here is to notice the difference between "potential demand" and "Actual demand".
C fills out the crack.

Originally posted by rickysinghk11 on 10 Mar 2019, 17:53.
Last edited by rickysinghk11 on 10 Mar 2019, 18:25, edited 1 time in total.
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Re: Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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30 Mar 2019, 03:55
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Global ecological problems reduce to the problem of balancing supply and demand. Supply is strictly confined by the earth’s limitations. Demand, however, is essentially unlimited, as there are no limits on the potential demands made by humans. The natural tendency for there to be an imbalance between demand and sustainable supply is the source of these global problems. Therefore, any solutions require reducing current human demand.

Which one of the following is an assumption on which the argument depends?

Conclusion : Any solutions require reducing current human demand.

Why? First point comes in mind is due to limited supply and excessive demand.

(A) Supply and demand tend to balance themselves in the long run.

If this is the case then there is no need to discuss the conclusion.

(B) It is possible to determine the limitations of the earth’s sustainable supply.

Possibility of determining limitations of earth's sustainable supply is irrelevant.

(C) Actual human demand exceeds the earth’s sustainable supply.

Correct : If this is negated, the conclusion will not hold true. We can't do anything about supply so try to reduce demand.

(D) It is never possible to achieve a balance between the environmental supply and human demand.

Same as A.

(E) Human consumption does not decrease the environmental supply.

If this is true then it is good. No purpose of writing such conclusion.
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Re: Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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30 Mar 2019, 11:25
Global ecological problems reduce to the problem of balancing supply and demand. Supply is strictly confined by the earth’s limitations. Demand, however, is essentially unlimited, as there are no limits on the potential demands made by humans. The natural tendency for there to be an imbalance between demand and sustainable supply is the source of these global problems. Therefore, any solutions require reducing current human demand.

Which one of the following is an assumption on which the argument depends?

(A) Supply and demand tend to balance themselves in the long run.
(B) It is possible to determine the limitations of the earth’s sustainable supply.
(C) Actual human demand exceeds the earth’s sustainable supply.
(D) It is never possible to achieve a balance between the environmental supply and human demand.
(E) Human consumption does not decrease the environmental supply.

Hi Folks,
Author relates Global ecological problems to supply & demand. Further in the argument, Earth is considered a supplier and humans as consumers.
Author claims that supply is confined, whereas demand is unlimited.
Author uses a strong word while drawing his conclusion "ANY" and insists on reducing current demand.

The argument seems to be hanging by authors claim that supply is limited and demand is unlimited.
Hence, it better be valid in order to draw such a strong conclusion.

Correct choice C validates author's claim. It also passes negation test. Logical opposite of choice C would be "Actual human demand does not exceed the earth’s sustainable supply." This clearly refutes Author's claim and conclusion falls apart naturally.
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Re: Global ecological problems reduce to the problem of balancing supply a  [#permalink]

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03 Apr 2019, 05:18
1
Quote:
Global ecological problems reduce to the problem of balancing supply and demand. Supply is strictly confined by the earth’s limitations. Demand, however, is essentially unlimited, as there are no limits on the potential demands made by humans. The natural tendency for there to be an imbalance between demand and sustainable supply is the source of these global problems. Therefore, any solutions require reducing current human demand.

Conclusion: Solution for the global problems caused by an imbalance between demand and sustainable supply is to reduce current human demand.
But the premise talks about potential demands.
So, there is the logical gap. Author assumes that just like potential demands are unlimited, current human demands are also unlimited and exceed the supply. Only then the argument holds and that is why, we should reduce the current human demand.

Which one of the following is an assumption on which the argument depends?

Quote:
(A) Supply and demand tend to balance themselves in the long run.

Nothing of that sort is mentioned in the passage. Even if they do balance, is supply increased or demand decreased? We, cannot deduce and hence won't help the conclusion.

Quote:
(B) It is possible to determine the limitations of the earth’s sustainable supply.

If it is possible to determine the limitations of supply, then how is it helping the conclusion that demand should be decreased?

Quote:
(C) Actual human demand exceeds the earth’s sustainable supply.

Correct

Quote:
(D) It is never possible to achieve a balance between the environmental supply and human demand.

If anything, this statement is a weakner.

Quote:
(E) Human consumption does not decrease the environmental supply

It does not matter whether we can increase or decrease the supply. Conclusion is about reducing demand and this statement does not address that issue.
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Re: Global ecological problems reduce to the problem of balancing supply a   [#permalink] 03 Apr 2019, 05:18
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