環保小貼士

2006-10-18 2:12 am
種植一棵樹,能提供多少氧?

回答 (3)

2006-10-20 12:53 am
要知你說的是咩樹呀= =
多數一天都在0.7kg to 1.7kg呀
2006-10-18 5:35 am
in the day ,it will breathe out oxygen. The night it will as same as us.
參考: me
2006-10-18 2:41 am
about 0.5kg 1 hour
參考: me


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