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Old December 5, 2016   #14
Cole_Robbie
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Join Date: Jun 2012
Location: Illinois, zone 6
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There's a piece of research where food crops were grown in pure treated lumber sawdust as a medium, AND they used the old stuff, not the new. The only food crops that they could get to be above the government's safety threshold for arsenic in food were root crops, and even then it was only in the very tip of the root, which people would typically not eat anyway.

If there was anything toxic about lumber, it would have shown up by now and affected the countless people who work with it every day.
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