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' ~* s- [) e2 ?: E) @. ~
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 [- r  s# f5 x4 g6 X
SweetLemon 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.
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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?