[Terrapreta] Fwd: Fwd: Global Carbon Cycle

[Duane Pendergast]

Kevin,

 A global "Neo Terra Preta" system would presumably process organic waste
which now goes to landfills or is burned for fuel. Demolished wooden
buildings would thus become a source for char completing the transfer of
atmospheric carbon dioxide into growing forests, to buildings and ultimately
into the soil.

Duane

-----Original Message-----
From: terrapreta-bounces at bioenergylists.org
[mailto:terrapreta-bounces at bioenergylists.org] On Behalf Of Kevin Chisholm
Sent: June 6, 2007 12:34 AM
To: Tom Miles
Cc: terrapreta at bioenergylists.org
Subject: Re: [Terrapreta] Fwd: Fwd: Global Carbon Cycle

"This statement glibly assumes that there is area for young trees to grow 
and take CO2 from the atmosphere. The fatal flaw here is that the trees 
for the most part only grow in areas that were previously harvested. At 
the best, they temporarily sequester carbon until the trees mature and 
are again harvested. At that time, if the wood is used for fuel, then 
all the sequestered carbon is released in a short period of time. If 
they are not harvested, tehy die and rot anyway. If it is put into Terra 
Preta, it is virtually permanently sequestered, and if put into 
buildings, it is good for perhaps 20 to 200 years."

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