tvb now,tvbnow,bttvb0 ~- m( N: m) K- M0 V% t3 s
& V% H w# X2 S! G; G+ h/ j& `3 A
No, I read that when the leaves fall it released CO2 back to nature.tvb now,tvbnow,bttvb2 i W4 Q, Y8 U, f2 Z' G/ N
I don't know its true or not.
/ C# N: {- `* g7 ?, cSweetLemon 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? |