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公仔箱論壇$ _: D! L) r/ N, R; w7 z( H3 g
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
4 r9 b1 g, S" a; S: O公仔箱論壇

% h& u+ B# Q1 @' ?5.39.217.77:8898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。
7 b: {, O4 j. \7 dSweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

7 _# G0 m! U' V2 hTVBNOW 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。: g" T3 u0 n1 D% Z* N& S
No, I read that when the leaves fall it released CO2 back to nature.5.39.217.77:88981 E0 E. r0 h/ b, h) {9 H
I don't know its true or not.
/ V% v" l$ f5 m: e* L7 f( ?0 F4 R! LSweetLemon 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?