The image shows a green chalkboard with white chalk drawings and text written on it. The text reads "Müll Ökosysteme Berlin Raster" which translates to "CO2" in English. Below the text, there is an illustration of a tree with green leaves and branches. The tree is drawn in a simple, cartoon-like style. 

On the right side of the chalkboard, there are two smaller drawings - one of a building and the other of a flowchart. The flowchart shows the flow of water from the building to the tree. The drawings are in white chalk and are arranged in a way that they form a tree-like structure.

The background of the image is a white wall, and there is a desk with a computer monitor and other office supplies on it in the foreground.