Invasive plants infest about one hundred million acres in the U.S. each year, costing American industry billions of dollars. Diane and her guests talk about the risks of invasive weeds and how to identify, prevent, and control them.


  • Tom Elias director of the U.S. National Arboretum
  • Lori Williams executive director of the National Invasive Species Council
  • Ketzel Levine National Public Radio correspondent, author of "Plant This!" and host of

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