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

　　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 .

　　点评：环境问题也是四级作文命题重点话题之一。大学英语四级考试曾经考过Make our Cities Greener.近年来，全球气候异常，造成许多自然灾害的频繁，保护环境刻不容缓，已成为全社会乃至全人类共同关注的热点。

　　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

　　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 .

　　点评：环境问题也是四级作文命题重点话题之一。大学英语四级考试曾经考过Make our Cities Greener.近年来，全球气候异常，造成许多自然灾害的频繁，保护环境刻不容缓，已成为全社会乃至全人类共同关注的热点。