If several tons of material were stacked to a maximum height of three meters, this would require an area of 30 by 30 kilometers. It’s roughly the size of Germany’s largest island, Rügen, in the Baltic Sea.Professor Hamid Sadegh-Azar, a lecturer at the Technical University of Kaiserslautern, believes that not all ash and waste should be disposed of, some of the waste can be recycled.According to him, steel can be extracted from construction debris, melted down and reused. If the concrete is of good quality, it can be crushed and recycled. However, the use of salt water and poor quality additives in construction work makes recycling difficult.Materials such as low-quality masonry, plaster or concrete that can no longer be used are taken to landfills outside cities or to open areas. According to UN experts, construction waste does not pose serious environmental risks, unless asbestos has been used in it.
