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4 _) B0 v* l9 E3 y% y& M. v% v- kNo, I read that when the leaves fall it released CO2 back to nature.tvb now,tvbnow,bttvb* B$ l5 t! O- a4 ?; w& G4 U" U! H
I don't know its true or not.tvb now,tvbnow,bttvb2 D" X" O" O+ k# E
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? |