One aspect that I don't think I've even addressed in this course today is at least as important as the various natural backgrounds; I regard the durability of materials as at least as important in terms of health aspects.

This is always a reason for discussion, especially when it comes to textile floor coverings and natural fibers. Which in turn shows why it is not so easy to say that we only rely on natural fibers, because for the one thing we get a resource problem relatively quickly, there is too little growth, not even just the nettle fiber.

We would not be able to come close to representing the quantities of textile floor coverings that are produced today using natural fibers. The aspect of durability is now significantly longer with deliberately quotation marks in this course of good plastics than with many purely natural fiber floor coverings.

From the point of view of the overall life cycle, this is of course a relatively big, powerful lever when I work with materials, extremely robust, whether the traditional well-known ball yarn, whether it is the needle fleece, which sometimes persists in buildings for twenty or thirty years without any problems.

And over this long period of use, its impact, even though it is based on crude oil, has more than balanced out if, on the other hand, a natural fiber floor covering had to be replaced at significantly shorter renovation intervals.

So as a small food for thought that even perhaps not at first glance under the typical aspect of healthy, natural ecological materials, highly durable plastics have a health aspect, can be observed with many materials, so clearly taken into account in construction practice.

If it succeeds, and this is a very nice observation that we are making at the moment, that more and more companies are counting on saying yes, we do not produce with natural materials, but health is still very important to us, both for users and for the environment.

Accordingly, take-back systems are being established, where it is then possible to return the floor coverings after the useful life, for example, façade insulation materials are taken back again in order to produce one hundred percent recycled goods from these same recovered raw materials and thus be able to operate and work permanently in the cycle here.