▶ Your Answer :
In the lecture, the speaker contends that the methods suggested in the reading passages have some drawbacks. This casts doubt on the reading passage's point that there are viable ways that people can take advantage of coal without harming the environment.
To start with, the lecturer asserts that converting coal into a gas is not beneficial for the environment. He points out that making the coal into the gas requires a lot of fossil fules, and people should use a huge amount of water in order to get rid of impurities from the coal, damaging the environment. This is in direct opposition to the reading's argument that converting coal into the gas is a great solution to help the environment.
On top of that, the speaker argues that using a form of static electricity is not helpful for the environment. What this means is that when people use the static electricity, they can only extract ash particles from pollutants made by the coal that are a minor cause of injuring the environment. To be more specific, people cannot reduce a level of Co2, which is a primary reason for green house effect. This is contraditory to the reading passage's assertion that people can help the environment by using the form of static electricity.
Lastly, the lecturer maintains that fabric filters cannot be a viable solution for reducing coal's influence. He supports his idea by saying that the fabric filiters cannot collect a lot of waste, but they require a lot of maintence costs, so they are not efficient techniques. This rebuffs the reading's insistence that people can utilize the fabric filters in order to reduce coal's effect. |