SweetLemon

交通空氣污染應該都幾嚴重呀
& d: n  g' l  f. w3 T$ ]6 ntvb now,tvbnow,bttvbfree2penny 發表於 2016-7-12 09:30 PM

; c: D) z: Z$ C* g+ b# o0 D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。

SweetLemon

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。公仔箱論壇/ p! X5 Z+ O0 N% s
SweetLemon 發表於 2016-7-14 10:34 AM
0 {, \) K. _$ l1 d, V7 ?' I2 f5 E5.39.217.76not enough trees in the city

5.39.217.76+ I& [: m6 C: X
9 V+ h  q% w. T
No, I read that when the leaves fall it released CO2 back to nature.
9 ^' j% r. O1 A/ m公仔箱論壇I don't know its true or not.