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为了帮助大家高效备考雅思，Top雅思在线雅思频道为大家带来雅思写作话题范文：飞机限制问题，希望对大家雅思备考有所帮助。更多精彩尽请关注Top雅思在线雅思频道!
Automobiles produce less pollution than do airplanes. Automobiles also
consume less fossil fuel. Therefore it is necessary to restrict some flights. Do
you agree or disagree with this opinion?
The argument that the flights should be restricted is invalid. Clearly, it
is unconvincing to compare the volume of pollutants an airplane produces with
that generated by an automobile, because an airplane is shared by many
passengers while an automobile is usually for one or, at the best, several
passengers.
Suppose a visitor drives 1,000 miles, burning 100 liter gasoline and
emitting 10 cubic meter carbon dioxide, this very passenger is totally
responsible for such an environment problem. But to what extent should another
passenger, who travels the same distance by air, take environment
responsibility? If the airplane consumes 10,000 liter gasoline and produces 1000
cubic meter carbon dioxide and if altogether 300 passengers share the flight,
then traveling by air causes less environmental damage.
Another thing must also be in the list of consideration: the time.
Traveling by air saves time. The point is that even if traveling by automobiles
consumes less energy and produces less pollutants, traveling by air has a
variety of reasons. For instance, a patient is transported by air from where she
is injured to the hospital.
The opponents might argue that this is not the “unnecessary flights”.
Nevertheless it is ambiguous and vague to use such a term. How to define an
“unnecessary” flight? Is there a legal or generally accepted criterion against
which the feature of a flight can be clearly and correctly labeled as
“necessary” or “unnecessary”? Nay.
Therefore, the argument mentioned in the topic is neither logically sound
nor practically significant.
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