Steven Handel plucks garlic mustard, an invasive plant, on a visit to Hutcheson Memorial Forest. He says invasives are lessening the biodiversity of the forest. (Irina Zhorov/WHYY)

Preservation Nation

Our show today is about preservation, in nature and beyond. We’ll explore preserving the history of good and bad ideas, preserving ...

Air Date: May 20, 2016

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