Cloud Machine is a device for making small clouds. It is sent into the atmosphere in a weather-balloon payload. At a specific altitude the device disperses Cloud Condensation Nuclei (CCN) and water vapor. Moisture in the air condenses into cloud droplets around the CCN, forming into small temporary clouds. As a small scale model of geo-engineering proposals for creating clouds to shade and cool the planet, the project explores concepts of environmental governance, and paradigms of control through which we orient our relationship with nature.