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RT @AgroBioDiverse: @BillTracy1 @jrossibarra "There is no evidence over many decades in the 20th C of a narrowing of the genetic base." htt…
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@BillTracy1 @jrossibarra "There is no evidence over many decades in the 20th C of a narrowing of the genetic base." https://t.co/BPqcZBVz0s