> -----Original Message-----
> From: owner-extropians@extropy.com
> [mailto:owner-extropians@extropy.com]On Behalf Of Michael S. Lorrey
> This would require that you spread out low quality ores already
> dug out of the
> ground, and grow your pennycress on top of it to extract higher
> grade ore, all
> while polluting your watershed with high heavy metal content runoff.
>
> Growing this on normal soil would cause the plants to leach
> nutrient levels of
> the metals out of the soil, degrading the quality of the soil.
Very good points, Michael, and this is typical of USDA projects (and
probably of most gov't sponsered research). The reason I stuck the link up
there is to stimulate people's imaginations. Think terraforming, for
example.
Bonnie
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