从考试汇总可知作文可以说是考试的重难点，也是让考生最头疼的内容，作文除了需要我们有一定的词汇积累，也需要我们不间断的练习，练习多了才能熟能生巧，才能下笔成章，下面来一起练习一下这篇四级作文吧，希望考生能够更好地为12月份的四六级考试提前做好准备。

　　Directions: For this part, you are allowed 30 minutes to write a short essay on the topic Environmental Protection. You should write at least 120 words following the outline given below.

　　1. 全球变暖对地球环境造成了很大影响

　　2. 引起全球变暖的原因

　　3. 我们需要采取的措施

    作文范文：

　　Environmental Protection

　　No one，regardless of race, religion or nationality, can deny that the world we live in is becoming increasingly intolerable because of the effects of global warming. According to many experts, even greater impacts are still on the way.

　　There are numerous causes for this problem. On one hand, human-related emissions of carbon into the atmosphere is causing, and will in the future cause, significant global warming according to the theory. On the other hand, the lack of knowledge about the importance of protecting environment hinders the solving of the problem.

　　It is urgent that immediate and effective actions should be taken right away. First, more trees need to be planted to help improve and beautify the environment. Besides, stricter laws concerning global warming and irresponsible use of fuel resources have to be put into effect and achieved good results. In a word, there is a long way to go before we can take a comfortable world for granted again .