argument71 [AWB小组] 第二次作业

dennis1230UID: 2247126

TOPIC: ARGUMENT71 - 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.
WORDS: 400

The argument concludes the amount of electricity used by the copper-extraction industry will be reducing significantly. To support this conclusion the arguer mentions that new copper-extracting technologies can use up to 40 percent less electricity than the old method. In addition, the arguer points out that extracting pure copper from ore requires large amounts of electric energy. The argument sounds good, but suffers from several logical flaws and is therefore unconvincing.

First of all, the argument is based on using large amounts of electric energy when the proportion of copper in the ore is low, and the arguer point out the proportion of copper in the ore is different. However, the arguer does not provide any certain evidence that copper-extraction from the high lever of copper in the ore requires also an avalanche of electric energy. Perhaps the electric energy for the high lever of copper's extracting always  so that exerting the new technologies cannot give any advance to deduct the amount of electricity. Further, the misleading of new technologies may increase the total expenditure.

Even if the electric energy in the any lever of copper's extracting can reduce by the new technologies, the total electric energy still needs to be concerned. The copper occurs in nature mixed with other minerals and valuable metals in ore, but the arguer neglects the fact that how much effort would be given by new technologies in order to extract other valuable metals and whether the new technologies is suitable to this task or not. If not, we will spend the more time and money, although it is not apparent now, to correct the wasting of other valuable minerals and metals. Without what mentioned above, it is impossible to accept arguer’s conclusion.

Finally but not the least, in this argument the local environment is also overlooked. It may bring a negative effect on this local environment--it is so sensitive that any pollution even slight will change the fragile balance--by new copper-extracting technologies. For the matter, the effect, although will decline the amount of electricity, will also influence on the human health, especially the workers and the nearby residents. In addition, the arguer does not cite the detail of the expense of studying the new technologies and importing the machines.

In sum, the conclusion is weak. If the arguer desires to convince us, the more persuasive detail and information is necessary, and it is important to show the activity effect of using the new technologies.

写得真累，求拍

[ 本帖最后由 dennis1230 于 2007-2-11 14:35 编辑 ]