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 D9 z$ o+ d& N0 u' A+ vfree2penny 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。
' K5 Z2 B1 D" l$ Y9 L1 NSweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

" ^1 o* h! U; _- M& G7 u' U公仔箱論壇. x) T! P2 d5 Q
No, I read that when the leaves fall it released CO2 back to nature.
" ^8 e( w: j0 j6 J) sI don't know its true or not.
, u( x; u; W0 S$ Wtvb now,tvbnow,bttvbSweetLemon 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?