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3 j# e& `" D, R, l7 b) e; hwww1.tvboxnow.comNo, I read that when the leaves fall it released CO2 back to nature.
# ?/ ]: w* ` [7 Z8 x3 `2 T$ g" BI don't know its true or not./ w: h& W, z7 i y9 U! w" h
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? |