Place sources of data into squares. Sources for a clean process will likely involve some form of clean energy, such as the sun.
Place processes into rectangles. Processes convert your sources of data into something else. For example, solar panels would convert energy from the sun into something else.
Place the data stores into open-ended rectangles. Data stores represent the facilities that actually store the clean energy you have produced. Connect all of the information together with arrows to provide a coherent sequence.