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5.39.217.773 S! L+ _  q9 J& K
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
5 w; B3 a2 {. O" DTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。

5.39.217.77$ ]2 n5 L, K7 m0 C6 f7 K4 C, [
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。5.39.217.774 m2 s: l; }, A% U- k
SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。/ N% {! F# i& k9 w2 D! Q4 e: J) N1 c5 {

1 H/ J/ k; v6 b2 htvb now,tvbnow,bttvbNo, I read that when the leaves fall it released CO2 back to nature.
) j' D8 X1 e3 j* W5.39.217.77I don't know its true or not.5.39.217.77) l0 [! d3 z( _" p; d- v
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?