The image shows a green chalkboard in a classroom. The chalkboard is divided into two sections, with the left section on the left and the right section in the middle. On the left side of the chalkboard, there is a drawing of a tree with the words "Mull CO2" written above it. The tree is drawn in white chalk and has a bird perched on one of its branches. Below the tree, there are several smaller drawings of different types of plants and flowers. 

The right section of the blackboard has a flowchart drawn on it, which appears to be a diagram or flowchart. The flowchart is made up of various shapes and lines, including circles, squares, and rectangles. There are also several arrows pointing in different directions, indicating the flow of information or data.

At the bottom of the image, there appears to have a blue bucket and a plastic container on the floor. The background of the classroom is white, and there are other chalkboards and posters on the walls.