On Dec 8 2008, 7:41 pm, "David B. Benson" <[email protected]>
wrote:
> On Dec 6, 3:48 pm, "[email protected]"
>
> <[email protected]> wrote:
> > ...
> > Are there any known negatives
> > about biochar? Any idea of the economics involved?
>
> Biochar is almost surely to include some VOCs (volatile organic carbon
> compounds). More than just a little of this is quite bad. Some tests
> suggest that soils with 30% biochar have overdone it and radishes
> won't start.
>
> On a large scale, assuming no centralized source of dry biomass
> collected for other reasons, the cost will be about $120--150 per
> tonne once spreading costs are included. Very oten biowastes are
> collected anyway during harvest, dropping the cost down to around $75
> per tonne after spreading. Modest amounts produce impressive returns
> on investment for both maize and wheat (probably other crops as well).
>
> Here is a useful link for you:
>
> http://terrapreta.bioenergylists.org/
Lovelock thinks its mankind's last hope:
http://www.newscientist.com/article/mg20126921.500-one-last-chance-to-save-mankind.html?full=true&print=true
He was interview by Gaia Vince:
http://i161.photobucket.com/albums/t222/inkettes/SSAG%2022Feb2007/gaiavinceframedhigh.jpg
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