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题库 / GMATLA-CR-23
Proposal: Carbon dioxide and methane in the atmosphere block the escape of heat into space. So emission of these "greenhouse" gases contributes to global warming. In order to reduce global warming, emission of greenhouse gases needs to be reduced. Therefore, the methane now emitted from open landfills should instead be burned to produce electricity.
Objection: The burning of methane generates carbon dioxide that is released into the atmosphere.
Which of the following, if true, most adequately counters the objection made to the proposal?
Every time a human being or other mammal exhales, there is some carbon dioxide released into the air.
The conversion of methane to electricity would occur at a considerable distance from the landfills.
The methane that is used to generate electricity would generally be used as a substitute for a fuel that does not produce any greenhouse gases when burned.
Methane in the atmosphere is more effective in blocking the escape of heat from the Earth than is carbon dioxide.
The amount of methane emitted from the landfills could be reduced if the materials whose decomposition produces methane were not discarded, but recycled.
P：
背景-CO2和甲烷都会影响大气层内的热量排放，造成全球变暖。
方案推理-燃烧甲烷供电可以减少全球变暖效应
O：反对-甲烷燃烧也会释放CO2（上述方案的一个副作用）
问题：most adequately counter the objections 即反对Objection➡️ 加强P
答案应当涉及上述方案 burn methane - reduce global warming
燃烧甲烷也会造成二氧化碳排放
削弱
A 人呼吸也会排放co2，无关
B 甲烷燃烧离垃圾场远，无关
C 甲烷会成为绿色环保fuel的代替物，无关
D 甲烷比二氧化碳更能造成温室效应，削弱。
E 甲烷在xx情况下排放量可以减少，无关，加了特定条件缩小范围
C是M替代一种不产生污染的能源
M比二氧化碳更阻止地球散热，所以要burn 转换为CO2,这样就比以前更少block heat 了
前提：燃烧M会产生二氧化碳
结论：燃烧M对减少变暖没作用
C. M可以作为一种fuel的替代物，不会造成gase污染是的fuel，而不是M
D. M比二氧化碳更保温，那么就会阻隔gase的释放，加剧温室效应。所以即使M产生了二氧化碳，也比直接排放掉好。
similarity中找difference
more effective???in bloking??那不就是比二氧化碳更阻止地球散热吗？ 这句话到底怎么理解？
Proposal: 我们应该通过燃烧的方式让甲烷转化成电力
Objection: 这种燃烧转换的方式会产生CO2
问: 哪一种counter objection，就等于问哪一种支持proposal
D选项：甲烷会更有效的阻止热量散发（加重温室效应），所以我们应该通过燃烧的方式把它转化成电力，尽管这个过程会产生CO2，产生的CO2对温室效应的影响还是要小于甲烷对其的影响。
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