▶ Your Answer :
The reading passage covers three major
points concerning several methods to mitigate environmental damage when using
coal. The listening passage, however, clearly states that why these points are
debatable.
The first point made by the author is that converting
coal into a gas, syngas, is one method. But, the speaker challenges this by
mentioning that coal must be heated to generate syngas so that it still emits
harmful emission. Also, this method would pollute the water because impurities
have to be washed. Hence, using syngas is may not be an eco-friendly method to
substitute the traditional method.
Another point made by the writer is that
using a form of static energy can extract the pollutants. On the contrary, the
lecturer asserts that this is not plausible due to the fact, as static energy
does not collect CO2, this method does not reduce carbon dioxide, which is the
main cause of climate change. Thus, using static energy might not be a
persuasive method to alternate the current coal burning method.
Lastly, the reading claims that using
fabric filters is one possible method. The professor further debunks this by
saying that this method requires frequent maintenance and the filter must be
changed regularly so it is not cost effective. Therefore, utilizing fabric
filters is probably not a viable method. |