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tvb now,tvbnow,bttvb! H0 s' ~, g, ]  B+ _3 M( l
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
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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。8 w& ?, V6 ^! ?2 i# G+ h: ^
SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

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/ v/ O1 z1 n* I; gtvb now,tvbnow,bttvbNo, I read that when the leaves fall it released CO2 back to nature.1 I, t0 e9 p, ]) _
I don't know its true or not.公仔箱論壇/ Q3 y) f, i' r# b6 ^( L: G
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?