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
7 h% Y) ~, `5 W" M7 r' B* Wfree2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
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5 F3 C+ q: N0 i; NTVBNOW 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。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。
' s6 ~4 @! ]4 Z. B! USweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

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No, I read that when the leaves fall it released CO2 back to nature.
+ l2 ]( _$ V$ R" Qtvb now,tvbnow,bttvbI don't know its true or not., S. ]6 Q4 i8 D2 a/ Y8 n
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?