WDR planet wissen: The battle for sand
Sand is one of the most sought-after raw materials in the world. The global demand for sand is gigantic and has tripled in the past 20 years. Sand is in the concrete of booming megacities around the world and is important in coastal protection. How do we have to build so that cities can continue to grow in the future?
This and many other questions are addressed in the current edition of Planet Wissen, “The battle for sand – new ways of dealing with the coveted raw material. In the second half of the episode, Prof. Dirk E. Hebel from KIT is a guest in the studio with the moderator Jo Hiller and reports on recycling-friendly construction, single-variety, degradable construction, and alternative building materials such as bamboo or mycelium.
