In the large sand deserts, where according to conventional opinion there should be enough sand, this building material resource cannot be extracted: The desert sand has no edges because the wind grinds the sand grains around. Sand mining has massive consequences for the environment along rivers and coasts. Every year, 40 to 50 billion tons of sand are consumed. Take sand, for example: As an aggregate for concrete, sand is in such high demand that the phrase “like sand on the seashore” as a synonym for abundance has long since become obsolete. Sand as a building material does not exist “like sand on the seashore” Sustainability is the only way to ensure that raw materials will continue to be available in sufficient quantities in the future. The global economy must therefore radically rethink its approach – and focus on sustainability. But there is another, far more worrying reason for the shortage of building materials: resources are running out. According to the law of supply and demand, building materials are therefore becoming massively more expensive. On the one hand, this is due to a worldwide construction boom: The supply of building materials is currently not keeping pace with the permanently increasing demand. Sustainability in building materials gets more and more important, since rar materials are becoming scarcer.
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