公仔箱論壇+ O" L0 b7 X3 ~: w' Y
! f; ^, W0 p: W4 \No, I read that when the leaves fall it released CO2 back to nature.公仔箱論壇* ]- W$ S) s" |
I don't know its true or not.
8 L9 K7 r' `, S5.39.217.76SweetLemon 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? |