Think about the last meal you ate.Do you know where the ingredients came from and how many miles they traveled from the field to the grocery shelf?

If you are like many Americans, you might not know the answer to that question—our speaker Vicki Robin is out to try and change this.

Back in 2010, Robin took on the challenge to spend 30 days only eating food grown within 10 miles of her home. From this experience, Robin became an advocate for locally grown foods and sustainability and in her new book Blessing the Hands That Feeds Us: What Eating Closer to Home Can Teach Us About Food, Community, and Our Place on Earth she teaches readers the abundant benefits of eating close to home. She echoes this message in her highly engaging lectures and challenges audiences to get active in social and political change.

From ingredient transparency to sustainability, many Americans are eager to take a more hands-on-approach to what they eat. In addition to Vicki Robin, below is a selection of speakers that will help audiences better understand their food and provide inspiring insight on how to be more informed consumers, gardeners, and activists.

Alice Waters is internationally recognized as the pioneer of a movement that advocates for just, sustainable, and organic food. Her work emphasizes the importance of edible education in our school system. She is the founder of Chez Panisse restaurant and the Edible Schoolyard Project, and has been honored with various international awards for her work as an activist and humanitarian.

As founder of The Organic Gardener Ltd. and author of From the Ground Up: A Food Grower’s Education in Life, Love, and the Movement That’s Changing the Nation, Jeanne Nolan’s sustainable-seed-to-table approach educates and inspires audiences to change the way we think about food. Jeanne’s touching personal story, passion for gardening, and experience educating others about organic food makes her a popular speaker for schools, gardening clubs, community groups, and nonprofits.

Paul Greenberg, the James Beard Award-winning author of the New York Times bestseller Four Fish: The Future of the Last Wild Food lectures widely—at venues ranging from Google to the United States Senate to the Culinary Institute of America—on seafood and ocean sustainability. A fellow at The Blue Ocean Institute, Greenberg published his latest book, American Catch: The Fight for Our Local Seafood, in June 2014.