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
; O9 I" O' Y9 f( Z/ V5 b5.39.217.77free2penny 發表於 2016-7-12 09:30 PM

所以車有cabin air filter5.39.217.77# E. L. P$ c" _

公仔箱論壇- [+ j5 y, }" X
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。
1 l) t9 N* w2 Q9 l# h公仔箱論壇SweetLemon 發表於 2016-7-14 10:34 AM

not enough trees in the city

Pedestrian_A

公仔箱論壇. M' [, g( l, |1 ]5 E+ L8 I- Y. K. V
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。7 X* _4 \0 k4 I+ u( E* `) D
No, I read that when the leaves fall it released CO2 back to nature.公仔箱論壇! `% [( O, F; d( f% n* o* \
I don't know its true or not.tvb now,tvbnow,bttvb  l/ c) L# v$ S/ X
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?