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
* z  ^6 c- `% A1 @! R$ K) P4 Hwww.tvboxnow.comfree2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
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! s1 e; l. Z: b2 y7 A/ j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。
# x- \+ X' w1 O" hwww.tvboxnow.comSweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

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9 P* ?# w9 X4 ]No, I read that when the leaves fall it released CO2 back to nature.公仔箱論壇& K2 Z. d$ L/ K* V) p
I don't know its true or not.& d) s( t9 U+ P4 B6 I$ R
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?