The
lecturer argues that the reading’s claim is groundless. This counters the
reading’s claim that to make the use of coal environmentally, several methods
are now being pursued.
First,
the lecturer asserts that gasification of coal is not a good solution. During
the conversion of coal to gas, heating is necessary. In this process, harmful
substances are produces when burning the fossil fuels. In addition, removal of
impurities requires water which ends up with waste. This contradicts the
reading passage’s claim that gasification is a fascinating solution.
Next,
the lecturer claims that it is worse to use static electricity. Although it
collects pollutants produced by the coal, it can only trap ashes but not the
carbon which is more environmentally detrimental. As a greenhouse gas, carbon
dioxide is the worst pollutant because they causes global warming. This casts
doubts on the reading passage’s claim that the use of static electricity is an
alternative way to solve the problem.
Finally,
the lecturer states that there is too much work for the fabric filters. They only
last for a short time, therefore, it is not cost effective to replace them
regularly. On top of that, a large fan is needed. Lots of energy is required
for the operation which lowers the efficiency. This refutes the reading passage’s
claim that another method to reduce the influence of coal is fabric filter.