公仔箱論壇2 N$ m# ~1 ^; A3 g0 {) ]
4 v, i! \' T. B! Y
No, I read that when the leaves fall it released CO2 back to nature.www.tvboxnow.com/ N& S% `4 V$ }0 ?* X% D2 L
I don't know its true or not.tvb now,tvbnow,bttvb& J0 Q$ c( o+ q* m. o
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? |