- @ L+ |! m" Wtvb now,tvbnow,bttvbtvb now,tvbnow,bttvb* B! Y+ m; Y c5 _
No, I read that when the leaves fall it released CO2 back to nature.7 T( k8 |5 u& Z2 E
I don't know its true or not.7 s) P" J. Y1 s- B0 Q/ N
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? |