Video Clip (2)
http://www.youtube.com/watch?v=CxUK2TizQ4g
Video Clip (3)
http://www.youtube.com/watch?v=oPkOFwaGKG0
1. What is the main cause for ‘Global Warming’?
2. Do you know how to say it in English?
(1) 全球暖化
(2) 溫室效應
3. What can we do to save the earth?