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真實加拿大一号公路http://i.cbc.ca/1.3259658.1444169907!/fileImage/httpImage/image.jpg" border="0">_gen/derivatives/16x9_620/drivebc- ...
Pedestrian_A 發表於 2016-7-2 02:17 PM

公仔箱論壇" [. N3 b* Y6 i! U+ M( R真實加拿大一号公路http://i.cbc.ca/1.3259658.1444169907!/fileImage/httpImage/image.jpg" border="0">_gen/derivatives/16x9_620/drivebc- ...
Pedestrian_A 發表於 2016-7-2 02:17 PM



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,bttvb/ u% i& E h" j) C+ [+ {$ S
SweetLemon 發表於 2016-7-14 10:34 AM

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% {4 ^ v9 L. q+ s' s ~$ q3 Y
SweetLemon 發表於 2016-7-14 10:34 AM
not enough trees in the city
tvb now,tvbnow,bttvb/ A' d. S7 X' `
No, I read that when the leaves fall it released CO2 back to nature.' h2 I, D+ C: H* K
I don't know its true or not.
SweetLemon 發表於 2016-7-14 08:05 PM
How many trees are needed?
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