Dr. Barbara Mahler of the U.S. Geological Survey comes to the Chicago area to explain why coal-tar-sealants are a potential danger. Mike joins his fellow workers from the Green on McLean community garden to celebrate and say good-bye to the plot of land that changed their neighborhood. Green Divas Meg and Lynn drop by to chat about GDGD Radio.

Gene McMullen, a factory worker in Streator, Illinois who recently grew the heaviest pumpkin ever recorded in North America, at 2145.5 pounds, talks to Mike about the unpredictability of growing giant pumpkins. The Reverand Linda Wygant of Grace Seeds Ministry talks about her award-winning Share the Harvest Project, and Marina Post of INUAg, explains why her organization is distributing grants to Wygant's and worthy groups worldwide.

New York Times bestselling author Amy Stewart appears at Anderson's Bookshop in Naperville, where Kathleen Thompson interviews her about her first novel, Girl Waits with Gun, based on a true story. Mike heads to North Shore Country Club in Glenview, where General Superintendent Dan Dinelli talks to him about strategies for making a golf course more environmentally friendly.

The legendary Willie Nelson and his friends come to Chicago to present Farm Aid 30, where thousands of people gather not only to listen to some of the biggest stars in the musical world, but to talk strategy about how to help family farmers all over the country. Mike and Green Diva Lynn talk to many of these folks and, among others, you'll hear artists John Mellencamp, Dave Matthews and Neil Young talk about the need to change the way we think about food production in the U.S.

Mayo Underwood has gone from selling heirloom seeds in Chicago to working to preserve historic Amherst Island in Lake Ontario from a wind farm that could pose a threat to local bird and bat populations. Pam Tallon also lives in Ontario, but on the shores of Lake Superior, and she talks about growing vegetables in winter. Mike heads to the Chicago Botanic Garden to find out why Spike the Titum Arum failed to bloom, and what happens next to the plant.