▶ Your Answer :
In the reading passage, the writer introduces some ways to
use coal without damage. On the other hand, the lecturer insists that there are
some drawbacks against alleged methods.
First, the lecturer argues that gasification transforms are
not a proper solution. When coal is converted into a gas, it should heat.
However, since the process needs to burning fossil fuels, this produces a lot
of harmful emissions. In addition, removing impurities from the coal also
requires huge amount of water. To eliminate pollutant in coal, other resources
should waste. This casts doubt on the reading passage's claim that by using
gasification transforms, a lot of pollution form coal can be prevented.
Second, the lecturer contends that extracting the pollutants
from coal out of the air is not a better option to prevent pollution. The
methods only sieve ash from coal. Carbon dioxide which harmfully affect the
environment cannot be removed. Even if certain ash is filtered, this is just
minor effect to the environment. This counters the reading passage's assertion
that a way to extract the pollutant will prevent harming the environment by
coal.
Finally, the lecturer asserts that fabric filter is not
effective because a lot of maintenances are required. The filter bags cannot
use for long period because of short life and weakness. A lot of energy need to
install the apparatus, which over weight their efficiency. This rebuffs the
reading passage's point that fabric filter will reduce damage coming from the
usage of coal.
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