question about gwd-6-32

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?

1. Every time a human being or other mammal exhales, there is some carbon dioxide released into the air.


2. The conversion of methane to electricity would occur at a considerable distance from the landfills.


3. 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.


4. Methane in the atmosphere is more effective in blocking the escape of heat from the Earth than is carbon dioxide.


5. The amount of methane emitted from the landfills could be reduced if the materials whose decomposition produces methane were not disc

      answer is D, but i think c is the best  choice to counter the objection, NN pls give a hand!!

答案应该是D。反对意见说，燃烧M会产生C，所以燃烧M这个计划不管用。也就是说，去掉了M，产生了C，对温室效应的作用是一样的，因此proposal没有意义。但这个反对意见忽略了一点：如果M比C产生的温室效应更大的话，那么烧掉M产生C也会使得proposal有意义。答案D指出了这一点。

C说的是：燃烧M没有产生C。这是在反对文章给出的前提了。这没有说服力。就像两个小孩吵架，一个说，我是对的，另一个说，你就是不对。这是斗气不是削弱：）费费说了，削弱千万不能去削前提。

Up,

do u mean "C"  is irrational or incredible, is it right?

考试时假定所以给出的答案都是事实。C无关。

原文是什么意思？

如果Methane in the atmosphere is more effective in blocking the escape of heat from the Earth ， 那为什么要burn,burn了之后是不是不能blocking the escape of heat from the Earth ，反而没用？

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.

我怎么觉得c是说：m虽然燃烧会产生c，但m能生电，而电能减少其他燃料的使用，从而减少c的排放。
虽然C也weaken，但还是D来得直接，也更相关原文，所以还是应该选D （虽然这题错选了C -_-b ）

btw ：
1， D有flaw：如果m燃烧产生了很多很多很多c（虽然化学原理上不是这样的），虽然m害处小，但燃烧后由于c太多了，可能还是不燃烧m的好～～～ 呵呵；而C却虽然绕了点，但却从产生环保的电能弥补了这点flaw
2： 借这个题目问问nn们一个心理问题：做cr时，感觉最麻烦的就是过不了自己这关。像这个题目，看完提干，马上想到的就是“M能产生环保的电能啊！电能能减少c的排放” ，于是心里总是想“电能电能”，看到c就选了，然后再匆匆的看到d、e（有时候甚至d、e都不看了），就怎么都觉得不顺眼了～sigh，这样的情况出现好多次了，白错的好多题目，郁闷，怎么才能在做题时客服这总心理呢？

汗，果然看错选项...  

还是阅读理解不行啊~~~

多谢携隐jj  

多谢携隐jj  

我也明了

“费费说了，削弱千万不能去削前提。”－－－－一定记牢

说的有理。尽管理智告诉哦肯定的选d， 但是它的却有点小毛病， 就是用甲烷燃烧放出的电能没有考虑进去， 哦读题的时候就想到这个bug ,可惜没有在答案中出现。