Carbon Sponge is an interdisciplinary collaboration exploring the potential for urban soils to sequester carbon as a means to mitigate anthropogenic greenhouse gases and build healthy soil. We are a group of artists, scientists, agroecologists, community gardeners and educators based in New York City dedicated to participatory science and transparency in research as well as using art to engage broad audiences. The project relies on various forms of knowledge, including scientific and older Indigenous practices. In 2022, Carbon Sponge will train youth ambassadors in the practices of urban carbon farming and monitoring with the Carbon Sponge Kit.