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 J! X6 z2 p/ o# p
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filtertvb now,tvbnow,bttvb0 g& l4 w5 h4 t, N" A" u  Q

: M  B/ V; U% C% e2 wwww.tvboxnow.com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。
$ W, W4 X1 L7 _7 ]+ C( T) |: LTVBNOW 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。SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

" G+ p$ u/ R5 h5 Z7 x. |: {+ U, w
( T6 k9 {/ |; w0 r
No, I read that when the leaves fall it released CO2 back to nature.tvb now,tvbnow,bttvb5 r, I* m" V+ @: F" E
I don't know its true or not.tvb now,tvbnow,bttvb( r' w5 _- [  w+ w) ~
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?