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
4 ]) \8 ], E" g: |( `7 U* M+ mfree2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
, m* @8 p' r9 Z1 U2 W7 Ltvb now,tvbnow,bttvb

# w1 v, a- e% [# S4 f7 itvb now,tvbnow,bttvb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。5.39.217.77" l9 i2 u5 _0 A9 Z. K% f
SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

: _4 j- v' ?! w" a0 ]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。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。/ G9 _* d4 a& N  ~; H, a
No, I read that when the leaves fall it released CO2 back to nature.
" S% s, x4 ^8 b" m! h" ]3 |6 wI don't know its true or not.. W3 q+ V  B& G, o
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?