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Posted Fri Sep 12 2008: from 
BBC: 
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Earthworms to aid soil clean-up http://apocadocs.com/s.pl?1221255038 
Researchers at Reading University found that subtle changes occurred in metals as worms ingested and excreted soil.
These changes make it easier for plants to take up potentially toxic metals from contaminated land.
Earthworms could be the future "21st Century eco-warriors", scientists suggested at the British Association Science Festival in Liverpool. 
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