Geosynthetics – the invisible workers in the subsoil have developed over the last decades into an important element in innovative construction methods in earthworks and foundation engineering. Not only due to the many functions such as filtering, reinforcing, separating and sealing do they perform in a wide variety of applications. Positive practical experience in the use of geosynthetics, their constant further development and "equipping" with new functions also contribute to this. Not to forget: controlled, industrial production ensuring consistently high quality. This is further supported by the availability of a wide range of normative documents and regulations regarding quality, testing and performance specifications. With the proof of high durability and the associated longer service life, geosynthetics basically offer a perfect example of resource conservation and sustainability. Geosynthetics being in use means the amount of earthwork, soil replacement, transport routes and transport loads can be significantly reduced. This has a positive effect on the CO2 balance reducing costs of the entire construction project. And then? It becomes green! After the work's completion, a broad portfolio of erosion control products and greening aids made of natural and synthetic materials will be available.