AirCasting is a platform for recording, visualizing, mapping, and sharing environmental data using smart phone technology. Aimed at enhancing the impact of community voices on building greener cities, users can use their local measurements of sound, temperature, humidity, carbon monoxide, and nitrogen dioxide, and share their data with a worldwide community via the AirCasting CrowdMap with the goal of creating a set of “actionable data.” According to its creators, HabitatMap, a New York nonprofit devoted to environmental health justice, “Much of what happens in our immediate environment passes without note, despite the positive contribution that recording and crowdsourcing these moments may have on our understanding of our health and the health of our communities.”