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5.39.217.76' T, C( g% ^# r/ g5 w) c
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
1 O: f' E( \/ E

% _* ]2 I# D! R) a" c& [  JTVBNOW 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。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。
. N, d% B1 o; N# k6 z$ Q- k5.39.217.76SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

; ?" x" v. B5 K& w4 K' }
8 m# k+ ^( ]4 ?1 r) E& m9 Y' r7 F) |
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。9 X: ?! H4 w; a6 B( F& Z9 e
I don't know its true or not.! L" S/ T/ b: @# H" R0 C4 ?
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?