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; X' ]; z& ^8 a! l- r
free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter
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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。公仔箱論壇" U: p+ B4 {5 b/ z% H: {1 M! g0 N# F
SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

5.39.217.77:88986 ]) Y- X/ e! W
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No, I read that when the leaves fall it released CO2 back to nature.
" f7 S  H2 a0 h$ @' }1 ^% r, Atvb now,tvbnow,bttvbI don't know its true or not.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。. K) z% J9 B0 G$ d
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?