在备考英语四级考试的时候，建议考生多看一些翻译或写作方面的预测话题及范文，积累一些亮点词汇和句式表达，保证肚子里有“货”，这样上考场时才能自信满满。今天文都四六级和大家分享22020年6月大学英语四级作文常考话题：更热还是更冷?希望对您有所帮助。
大学英语四级作文常考话题：更热还是更冷?
Hotter or Colder ?
It was once thought that air pollution affected only the area immediately around large cities with factories and/or heavy automobile traffic.Today, we know that although these are the areas with the worst air pollution,the problem is literally worldwide.On several occasions over the past decade,a heavy cloud of air pollution has covered the entire eastern half of the United States and led to health warnings even in rural areas away from any major concentration of manufacturing and automobile traffic.
In fact, the climate of the entire earth may be affected by air pollution.Some scientists feel that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil) is creating a “greenhouse effect” —holding in heat reflected from the earth and raising the world’s average temperature.
If this view is correct and the world’s temperature is raised only a few degrees,much of the polar ice cap will melt and cities such as New York, Boston, Miami,and New Orleans will be under water.Another view, less widely held,is that increasing particulate matter in the atmosphere is blocking sunlight and lowering the earth’s temperature —a result that would be equally disastrous.A drop of just a few degrees could create something close to new ice age and would make agriculture difficult or impossible in many of our top farming areas.
At present we do not know for sure that either of these conditions will happen (though one recent government report prepared by experts in the field concluded that the greenhouse effect is very likely).Perhaps, if we are very lucky,the two tendencies will offset each other and the world’s temperature will stay about the same as it is now.
以上为2020年6月大学英语四级作文常考话题，再答四级写作的时候，考生们应该做到写作思路清晰明了，有层次，可以适当增加长难句和复杂句式，不要求全篇华丽词汇，希望本篇分析能给同学们的写作提供些许思路，祝同学们取得好成绩。
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