Douglas Gayeton is a photographer, filmmaker and web designer, but he calls himself an information artist. His current project is The Lexicon of Sustainability. The lexicon is a series of images, each representing a term, such as fair trade, free range, food deserts and pasture-raised, among others, in order to help people learn the language of sustainability. Gayeton has traveled across the United States for the past two years photographing farmers, activists, small business owners, fishermen and others in order to document the different ways these food and farm producers are putting sustainability into practice. Here are some of his images.