加拿大很多樹但也期望森林吸收掉人們無節制排放的二氧化碳。 % [3 `8 {- q4 v: J, X
SweetLemon 發表於 2016-7-14 10:34 AM tvb now,tvbnow,bttvb( b3 U( J1 B# G5 a' ]) d4 E$ q) s4 Y
not enough trees in the city tvb now,tvbnow,bttvb" x8 X$ a5 o; H% e
6 e% ~1 \- ~6 C+ ]4 uNo, I read that when the leaves fall it released CO2 back to nature.
, W6 E1 Y u& d3 m& c' x( Ntvb now,tvbnow,bttvbI don't know its true or not. |