Air pollution is a very common scenario in modern cities. Increasing use of automobile emit fumes that contains carbon dioxide (Co2). Inhaling too much carbon dioxide in injurious to health.
Example 1: I think global warming is a truth as we can see many climatic disasters in daily newspaper.
Example 2: The realty of current global warming is a controversial issue (argument). Scientists studying Antarctic ice layers are saying it`s a cyclic phenomenon and nothing to worry about. While we have also report of abrupt changes of temperature and sea level (example). Saying that, I think we are living in the era of sudden global warming (opinion).
我们可以看到,第二个例子中作者是如何一步步进行论述的,从而得出个人判断的。
雅思口语中另一个让我们的语言更加客观的方法是使用被动和it。
例如:
It can be concluded that... (we are living in the era of global warming)