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June 2007 - Sec 2 - LR - Q8

Video Transcript:

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Question 8: Proponents of the electric car maintain that when the technical
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problems associated with its battery design are solved, such cars will be widely
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used and, because they are emission-free, will result in the abatement of the environmental
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degradation caused by auto emissions. But unless we dam more rivers the electricity to
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charge these batteries will come from nuclear or coal-fired power plants. Each of these
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three power sources produces considerable environmental damage. Thus,
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the electric car blank. So we notice another argument completion question. Which one of
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the following most logically completes the argument. So again keep in mind what
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we already know that these proponents of this electric car maintained that once
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these technical problems these cars will be widely used they are emission free and
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therefore will result in an abatement of the environmental degradation caused by
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auto emissions. However the electricity used to charge these batteries of these
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electric cars will come from sources that produced considerable environmental
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damage. Thus, the electric car... So let's try to find an answer that logically completes
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this argument. So again these are a type of must be true question. Keeping in mind
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the information that was given to us before the blank let's take a look at (A): Will
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have worse environmental consequences that its proponents may believe. Does
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that logically complete the argument? And you notice that it does because the proponents are
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saying that when these are widely used and because their emission free this will
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result in an abatement of the environmental degradation caused by auto emissions. The
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problem is however that the electricity used to charge these batteries produces
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considerable environmental damage itself. Thus, the electric car will have worse
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environmental consequences than its proponents may believe. And (A) would be the correct
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answer. But again let's just make sure. (B) Will probably remain less popular
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than other types of
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cars. And you notice that we're not taking issue with the popularity of
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electric cars. The fact that they're going to be widely used if the battery design
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problems are solved. Were not taking issue with that. We're taking issue with the
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fact that the electricity to charge these batteries causes considerable
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environmental damage. So (B) does not follow. (C) Requires that purely technical
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problems to be solved before it can succeed. And again that's not the issue
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that's not what this passage is about. Its not about whether we're solving these
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technical problems. It's even if they are solved is it going to result in an abatement of the
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environmental degradation caused by auto emissions. And since the electricity
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used to charge these batteries causes considerable environmental damage itself
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that is what we're talking about.
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Not this idea of purely technical problems being solved. So (C) is out. Bringing me to (D): Will
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increase the total level of emissions rather than reduce it. And you notice
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that is too harsh
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we don't know if it's gonna increase it. It's possible that is just not as big of
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a decrease that its proponents thought. So (D) is too harsh. Again remember these are must be true
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questions. If it follows logically it must be true based on the information before. It
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doesn't tell us whether there is any environmental damage caused by the
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electricity to charge these batteries is more than the reduction in auto emissions.
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It doesn't say anything about that. So these are too harsh. And bringing me lastly to (E):
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Will not produce a net reduction in environmental degradation. Again we don't
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know. All we know is that electric cars are mission free and if they're widely used
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clearly we're going to have a drop in environmental damage. However, the
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electricity used to charge these batteries causes considerable damage. But again we don't
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know the relative size of either of these groups. So (E) does not follow
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logically and (E) would be eliminated. (D) and (E) have the same problem. It will increase will
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not produce a net reduction. We don't have information about that in the
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passage. Whereas (A) much more general,
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much more easy to support 100% and again 'logically completes' implies that it must be true
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so (A) would be the correct answer.