GWD6-Q32: Proposal: Carbon dioxide and methane in the atmosphere block the escape of heat into space. Some 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?
A. Every time a human being or other mammal exhales, there issome carbon dioxide released into the air. B. The conversion of methane to electricity would occur at aconsiderable distance from the landfills. C. The methane that is used to generate electricity wouldgenerally be used as a substitute for a fuel that does not produce anygreenhouse gases when burned. D. Methane in the atmosphere is more effective in blocking theescape of heat from the Earth than is carbon dioxide. E. The amount of methane emitted from the landfills could bereduced if the materials whose decomposition produces methane were notdiscarded, but recycled. 【答案】：D
明天就考试了，看到这个还有gwd的原题的答案居然还不能理解，心里很捉急，大家帮忙看看吧
**【考古】 注意变体！！！
GWD6-Q32: Proposal: Carbon dioxide and methane in the atmosphere block the escape of heat into space. Some 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?
A. Every time a human being or other mammal exhales, there issome carbon dioxide released into the air. B. The conversion of methane to electricity would occur at aconsiderable distance from the landfills. C. The methane that is used to generate electricity wouldgenerally be used as a substitute for a fuel that does not produce anygreenhouse gases when burned. D. Methane in the atmosphere is more effective in blocking theescape of heat from the Earth than is carbon dioxide. E. The amount of methane emitted from the landfills could bereduced if the materials whose decomposition produces methane were notdiscarded, but recycled. 【答案】：D