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$ Z* B9 T0 `0 wNo, I read that when the leaves fall it released CO2 back to nature.
* v p5 T+ v. ?2 R公仔箱論壇I don't know its true or not.' @$ p* B, Q0 e& G' U* T, L
SweetLemon 發表於 2016-7-14 08:05 PM  A tree can absorb 13lb CO2 every year. A typical V8 car produce 220g CO2 per km. How many trees are needed? |