PT109.S2.P3.Q20

PrepTest 109 - Section 2 - Passage 3 - Question 20

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P1

Experts anticipate that global atmospheric concentrations of carbon dioxide (CO. ██ ████ ████ ███████ ██ ███ ███ ██ ███ ████████████ ████████ ██ ██ █████ ████ ███ ███ ██████████ ██ ██████ ███████ ██ ████████ █████ ██████ ████ ██ █████ ██████████ ██ ████ ████ ███ ███████ ████████ ███

Intro topic · Global CO2 will probably increase
CO2 contributes to global warming.
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Perspective from some research · Increased CO2 can lead to agricultural abundance, which can decrease rate of global warming
If there are more plants, those plants might draw more CO2 from the atmosphere, which might slow down global warming.
P2

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Critique 1 · More CO2 could lead to less agricultural yields
Although CO2 increases plant growth rate, it affects some plants more than others. Weeds might grow faster and outcompete certain good plants.
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Consequence of Critique 1 · Different growth rates in plants can damage ecosystems
Weeds burn easily. More weeds could lead to more fires.
P3

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Critique 2 · More CO2 unlikely to slow down rate of global warming
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Support for Critique 2 · Global warming leads to more decomposing peat, which will release more CO2 into atmosphere
Although more CO2 can lead to more plant growth, which can absorb more CO2, that's counteracted by increased release of CO2 from peat.
Passage Style
Critique or debate
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20.

The passage supports which one ██ ███ █████████ ██████████ █████ ████ ██ ███ ██████ ███████████

a

More of it █████ █████████ ██ ████████████ ████ ████ ███████ ████████

Supported. We know that global warming causes increased plant growth, increased peat decomposition, and increased CO2 levels in wet tundra grasslands. This shows that if temperatures rose four degrees, the tundra would release 50% more CO2, suggesting that much more peat would be decomposing.

87%
b

It could help ██████ ███ ████ ███ ██████████ ██ ████████████ ████ ████ ███████ ████████

Anti-supported. This shows that if temperatures rose four degrees, peat in the tundra would release 50% more CO2, not absorb it.

1%
c

It will not █████████ ██████ ████████████ ████ ████ ███████ ████████

Unsupported. This suggests that peat decomposition will greatly increase if temperatures rise four degrees. But we can’t infer that peat will not decompose at all if temperatures stay the same or rise less than four degrees.

1%
d

It decomposes more ███████ ████ ████ █████ ██ ███████ ██ █████ ██████████

Unsupported. Higher regions like the tundra are expected to have the greatest temperature increase, which will increase peat decomposition, but this doesn’t mean that peat decomposes more quickly there. Other factors could cause peat in lower regions to decompose just as fast or even faster, despite a smaller temperature increase.

10%
e

More of it ███████████ ██ ███████ ██ █████ ██████████

Unsupported. We have no idea where the most peat accumulates. We just know that higher regions like the tundra are expected to have the greatest temperature increases, which will cause increased plant growth, increased peat decomposition, and increased CO2 levels.

1%

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