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' ?$ H* k5 \( m
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
. a7 j  B1 E. D" i* B; Vtvb now,tvbnow,bttvb

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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。
* U6 n1 v9 J7 |$ Rtvb now,tvbnow,bttvbSweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

公仔箱論壇; {/ w, d- ~4 }5 O: g" h
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No, I read that when the leaves fall it released CO2 back to nature.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。. Y) F. t" d8 k: p0 N" z  o& D' `7 ^
I don't know its true or not.
- t* V+ {& i4 ]0 [6 x5.39.217.77SweetLemon 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?