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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
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