▶ Your Answer : The lecturer argues that the methods used along with harnessing coal pose several drawbacks. This contradicts the reading passage's claim that coal is a beneficial natural source that does not harm the environment. First, the lecturer asserts that the conversion of coal into a gas is not eco-friendly. He explains that the gasification of coal fundamentally requires fossil fuels for heating; fossil fuels emit pollutants to air and, therefore, are as hazardous as the raw coal. Not only that, according to the lecturer, water gets polluted during the removal of the impurities of coal. Since the consequence of water being toxic is no better than the pollution by coal, coal conversion is likely to only worsen the environment. This casts doubt on the reading passage's claim that converting coal into a gas can reduce the risks or harming the environment. Next, the lecturer contends that the method of using static electricity to extract the pollutants is unreliable. While the reading passage suggests that the charge of static electricity can successfully remove the harmful particles emitted by coal, the lecturer claims that the charge, in fact, only abrades a fraction of the ash particles. Also, the static electricity emits carbondioxide which can gradually lead to the climate change. This counters the reading passage's claim that the process of removing the pollutants using static energy is safe and beneficial. Lastly, the lecturer affirms that the filter bags the reading passage suggests as an alternative are not efficient. Since the fabric filters require excessive energy when it comes to operating, it is not worthwhile exploiting. This
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