argument71 [Jet小组] 第六次作业

月亮熬的汤UID: 2382325

Argument 71:Copper occurs in nature mixed with other minerals and valuable metals in ore, and the proportion of copper in the ore can vary considerably. Until fairly recently, the only way to extract pure copper from ore was by using a process that requires large amounts of electric energy, especially if the proportion of copper in the ore is low. New copper-extracting technologies can use up to 40 percent less electricity than the older method to process the same amount of raw ore, especially when the proportion of copper in the ore is high. Therefore, we can expect the amount of electricity used by the copper-extraction industry to decline significantly.
字数：510                 时间：40 min                日期：2008-2-14

The author maintains that there will be a decline of the amount of electricity in the copper-extraction industry for the reason that new copper-extracting technologies, which use much less electricity than the old method, are available. It seems to be quite convincing, but after careful examine, several logical flaws are revealed.

First of all, the author asserts that the new copper-extracting technologies uses far less electricity than the old method but he fails to provide sufficient information to deduce that. Even though it is asserted in the argument that 40 percent less electricity can be saved by using the new method, but do the new technologies produce the same amount of copper as the old ones to process the same amount of raw ore. It is highly possible that much less copper can be extracted from the same amount of raw ore so it is no more effective than the old technologies. In fact, maybe more electricity will be needed to extract adequate amount of copper by applying the new technologies.

In addition, the comparison between the old method and new one made by the author is not scientifically, for the reason that they are compared under different circumstance. the proportion of copper in the ore is diversed and maybe the difficulty of extracting copper also vary greatly. As a result, it is unfair to maintain that a large amount of electric energy will be required by the old method when the proportion of copper in the ore is low. There are possibilities that even more electric energy will be consumed when the new technologies are applied to extract copper from ore which contains low proportion of copper. Only when the two methods are compared under same circumstance, which means that the proportion of copper in the ore is the some, can we get the conclusion that which one is more efficient.

Even if the new technologies really save more electricity than the old ones, the conclusion that the amount of electricity used by the copper-extraction industry will reduce largely is still unwarranted. The author fails to take into account the electricity that will be consumed to apply the new technologies and replace the old ones. It will be a large project so considerable electric energy will be used. What's more, whether the new technologies is friendly to the environment requires far more related information. There is a high possibility that the new technologies will do harm to the nature environment so a lot of devices to deal with the pollution produced by using the new method will have to be used. We should not neglect the electric energy consumed by these devices.

In sum, the conclusion that the new technologies will save a lot of electricity can not be drawn for the reasoning of the argument is groundless. To better strengthen the argument, the author should provide more evidence to show about the new technology on whether it really consumes more electric energy, whether it is environmental-friendly and how much electricity will be needed to apply these new technologies.

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