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
4 {: L6 h3 M* c" N9 v! |7 m2 Lfree2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter; L/ Y" P5 F+ R- `9 h

公仔箱論壇; x5 v$ h2 M2 ?- x! h' H: Z
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。9 m4 P: [0 g/ d5 X
SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

5.39.217.77* y/ V2 k  `0 M3 q. {& `; w

" N/ l2 \+ r* f5 M. I$ p; m5.39.217.77No, I read that when the leaves fall it released CO2 back to nature.
+ I2 a) o7 W9 p5 `; GTVBNOW 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。I don't know its true or not.3 U% C# Z! p+ @! _  Q: N$ O5 i2 B
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?