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Cyanobacteria are a class of bacteria known as the ancestors of today's chloroplasts and thus of plants. They also belong to the group of bacteria that perform oxygen photosynthesis and thus positively influence a large part of the world's climate. With the growth of the world population, the demand for renewable energy sources as well as chemicals and therapeutics is increasing, while a sustainable production of these compounds seems desirable. Cyanobacteria represent an alternative to the heterotrophic organisms traditionally used. They perform oxygen photosynthesis, using the energy of the sun, carbon dioxide (CO₂) and water (H₂O) to build up carbohydrates. This process also releases elemental oxygen (O₂), which can be used by other organisms. In addition, cyanobacteria require only a minimal supply of nutrients and can be cultivated at many sites, which provides a large variable biotechnological applicability. The production of high-value terpene products as well as establishing co-cultivations is our current focus.