In the old days, food marketers relied on cartoon characters, quirky commercials and colossal packaging to sell products. Today, it is all about selling sustainability. Putting the words "organic," "GMO free" or "free range" on the box seals the deal. Marketers and retailers have been hip to this shift for years and most consumers are playing right into plan. We talk with University of Idaho Extension horticulturist Ariel Agenbroad. She spoke last week for the U of I Vandal Voices series and her presentation, "How Smart Marketers Influence the Way We Eat," addresses how we buy our food.