Pedestrian_A

真實加拿大一号公路

Pedestrian_A

交通空氣污染應該都幾嚴重呀
* q/ \9 u, c7 W# L) I0 \* X5.39.217.77:8898free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter5.39.217.77:8898" N% l6 @& k1 _4 r0 F

  L! c7 T3 n- j6 V' [
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。
$ X1 N& f4 l; v/ L% Z/ i" c公仔箱論壇SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

  M2 s7 e7 x& ]
3 ^8 k- V7 b) Q& _/ l3 }
No, I read that when the leaves fall it released CO2 back to nature.
3 U/ P- l# I4 o+ `% S4 m4 p% f/ i公仔箱論壇I don't know its true or not.公仔箱論壇0 [& R7 }$ I9 f# D
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?