種一棵樹可以減少多少二氧化碳? - 社會議題
By Rosalind
at 2008-03-31T00:00
at 2008-03-31T00:00
Table of Contents
我想了解種一棵樹可以減少多少二氧化碳?因為現在不是在推一生一樹的活動,到底有用嗎?
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社會議題
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By Olive
at 2008-04-02T23:10
at 2008-04-02T23:10
By Emma
at 2008-04-04T01:50
at 2008-04-04T01:50
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