▶ Your Answer :
According to the reading, there is ample support for the author's claim that there are three ways for people to use coal without making harmful environmental effects. However, the professor in the lecture gives several reasons as a rebuttal to the author's point. First of all, the professor in the lecture argues that it is unlikely that gasification can remove the coal pollution in the air. This is because, people have to heat coals for convert them into a gas, which needs utilizing fossil fuels. Considering the fact that burning fossil materials leads a lot of pollution, gasification is not an effective solution. Also, removing impurities from the coal requires a large amount of water, which can pollute the water. In other words, gasification results in another destructive pollution in the nature. This refutes the reading passage's claim that gasification is an environment-friendly way to use the coal. Next, the professor in the listening insists that using static electricity to get rid of coal pollutions is not a good solution. Static electricity can only gather the ashes from the coal. In other words, the greenhouse gas which traps the heat and leads the climate change can not be removed. Since ashes are the relatively minor problem compared to carbon dioxide, using static electricity can not solve the fundamental problem of the coal pollution. This contradicts the reading passage's argue that a charge from the static electricity can extract pollutions from the coal. Finally, the professor in the lecture contends that it is absurd that the fabric filters are the effective way to reduce the waste from the coal. This is because, since the fabric filter has a short life span, it needs a lot of maintenance fees. Therefore, using fabric filters is not a cost-effective in a long term. Moreover, fabrics filter systems need many fans which require a large amount of energy, which can be also burdensome to the business owner. This casts doubts on the reading passage's claim that people can manage the pollution of coal by using fabric filters which can remove the harmful emissions from the coal.
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