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% g) Z* [# q) r- o: X
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
6 ~+ H/ X) ]+ g! g

5.39.217.76' j: }7 g6 ]0 I8 m/ q, s) Y
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。
1 k& `, f' o5 E8 U9 [5 Q# jTVBNOW 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。SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

) c7 @4 O0 G" i% K$ u2 k% W3 S公仔箱論壇2 ~8 a+ d7 m" l8 `& W$ r
No, I read that when the leaves fall it released CO2 back to nature.公仔箱論壇  Q/ E7 m' k* A( b
I don't know its true or not.
7 p' H* Z1 y5 A: J6 p0 MSweetLemon 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?