立刻就要迎來2023年12月份的英語四級考試了，新東方在線英語四級頻道為大伙整理了2023年12月英語四級作文熱門話題預(yù)測：空氣污染，大伙可以作為學(xué)習(xí)參考，爭取在短期內(nèi)突破英語四級寫作難題，高分通過大學(xué)習(xí)英語四級考試。

2023年12月英語四級作文熱門話題預(yù)測：空氣污染

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 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 .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.

以上是新東方在線英語四級頻道我們?yōu)榇蠡飵淼?023年12月英語四級作文熱門話題預(yù)測：空氣污染，期望考生們都能備考順利！