The image is a photograph of a presentation slide on a stage. The slide is titled "Detailed design of single unit" and has a white background with black text. The title is written in a bold font and is centered on the slide. Below the title, there is a diagram that shows the layout of a single unit. The diagram is divided into four sections, each with a different color and label. 

The first section is labeled "Treated Carbon" and shows the different types of carbon that are used in the design. The second section is labelled "Bacterial Activated Carbon" with labels for each type of carbon. The third section has labels for the different carbon types, such as carbon dioxide, carbon monoxide, and carbon dioxide. The fourth section has a label for the carbon type, which is labeled as "carbon monoxide".

In the foreground of the slide, there are silhouettes of people sitting in front of it, watching the presentation. The audience is visible in the background, and the stage is lit up with bright lights.