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 `/ d1 q  \0 G# j$ s; E" \free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
' A6 ~, P. K0 r" n; ZTVBNOW 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。

8 P: [% |% Z' @+ d% C3 J* Z5.39.217.76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。tvb now,tvbnow,bttvb5 a! ?( A+ I: `, o+ m
SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

7 |; Y& |$ @+ N$ k3 y" r7 L7 W$ ?7 H# }5.39.217.76
3 z4 J# R" K& f6 i5 Y! j4 K5.39.217.76No, I read that when the leaves fall it released CO2 back to nature.5.39.217.767 O0 D1 H) Y1 I5 k7 K( {
I don't know its true or not.
# c# m; `9 d! S, F  H4 b公仔箱論壇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?