Self-paced
P1
Experts anticipate that global atmospheric concentrations of carbon dioxide (CO2) will have doubled by the end of the twenty-first century. ██ ██ █████ ████ ███ ███ ██████████ ██ ██████ ███████ ██ ████████ █████ ██████ ████ ██ █████ ██████████ ██ ████ ████ ███ ███████ ████████ ███
Intro topic ·
Global CO2 will probably increase
CO2 contributes to global warming.
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.
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
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
17.
Which one of the following ████ █████████ ███ ████████ ██ ███ ████ █████████ ██ ███ ████████
a
It presents research ████ ███ █████████ █ ██████████ █████████ ██ ███ █████ ██████████
P3 uses research to undermine the hypothesis that increased vegetation would lead to increased CO2 uptake, which would decrease the rate of global warming. P3 argues that, because of increased decomposing peat, CO2 levels would still rise.
b
It presents solutions ███ █ ███████ █████████ ██ ███ █████ ███ ██████ ███████████
P3 does not present a solution to any problem. It just challenges the hypothesis presented in P1.
c
It provides an ██████████ ███████████ ███ █ ██████████ █████████ ██ ███ █████ ██████████
Anti-supported. P3 is refuting the hypothesis presented in P1, not providing an additional explanation for it.
d
It provides experimental ████ ██ ███████ ██ █ ██████ █████████ ██ ███ █████████ ██████████
P3 does provide experimental data— Billings’ simulation— but not in support of a theory described in P2. Instead, P3 provides experimental data that undermines a hypothesis described in P1.
e
It raises a ████████ ████ ███ ████ █████ ██ ███████████ █████████ ██ ███ █████████ ██████████
P3 doesn’t cast doubt on P2; these paragraphs work together to undermine the view presented in P1. Instead of (E), P3 raises additional research that may cast doubt on a hypothesis presented in P1.