The document discusses mining waste reduction methods through several pilot projects in different Baltic Sea Region countries. The Estonian project involves a mobile unit for processing mining waste into construction aggregates. The Swedish project develops a process for extracting valuable and hazardous metals from mining and metal waste. The Finnish project tests recycling mine waste by constructing a mobile module to grind and classify materials for potential use in wastewater purification. The Polish project produces artificial aggregate from mineral processing waste for construction using an agglomeration process. Overall the projects aim to promote sustainable waste management and resource recovery in the mining industry through knowledge sharing and demonstration of technologies across the Baltic Sea Region.