飞机限制问题
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.
上一篇: 雅思写作范文:身边城市交通问题
下一篇: 雅思写作范文:使用电脑利弊
如何形容型男的身材?
爱尔兰咖啡,天使的眼泪
Japan calls ambassador back for day
Internet savvy voters targeted on social media
Chinese students in US coming home for jobs
Sewage discharged into rivers
Seventeen partygoers 'found beheaded' in Afghanistan
Mars rover to find out if we're alone
Syrian PM defects to opposition
Games begin not with a bang, but a Tweet
Smoke still clouding up movies and TV
ROK-Japan dispute worries US
Gold-trading ring took in billions
Colors of the Life
Golden moments may be fewer in London
Street performers will soon gain legal status in Shanghai
What do you think of this weather?
Rescued fishing vessel heads to Tanzania
Libya's Olympic chief kidnapped
It's not doping that wins races, Sun says - it's lots of hard work
Monsoon floods in India kill 81, displace 2 million
Curiosity of a girl lands on Mars
Midtown Manhattan penthouse on sale for $100m
Clinton on landmark visit to Laos
Chinese beauty takes Miss World crown
Temple sued by daughter of monk
Inspectors eye rules for family planning
Robots? Nope - just really good athletes
Russia mourns flood victims
Tight security on an Olympic scale