Algae are small climate savers. Already extremely efficient in their natural photosynthesis outdoors, they bind ten times more carbon dioxide (CO₂) than land plants. In bioreactors with appropriate sensors, control technology and automation, the efficiency of algae can be increased to hundreds of times that of land plants. Therefore, they hold considerable potential for a climate-neutral circular economy. With the PhotoBionicCell research project, we are demonstrating a possible approach for the industrial biologization of tomorrow.