Earth Day, it is a seriously topic to us ,to the world. Why it exists? That because us. Why we need the day? That because us. What is it talking about, about us? No, about a big problem that we creat it. We need to solve it by ourselves to save the earth. Let's waching the video to learn what we can do in everyday, everything to respond to us, to the earth, our great living place.
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how about this video http://www.youtube.com/watch?v=DdoVZYGRpN4
ReplyDeleteI think it is better to understand gl 581
good luck