The LIFE BRINE MINING 4th Stakeholder Event took place at Poland. The meeting, which marked the final project event, held at the GIG premises, attracted a diverse audience, including policy makers, local government officials, representatives from the Polish Mining Group, members of the scientific community, and other key stakeholders. Prof Maria Loizidou from NTUA, LIFE BRINE MINING project coordinator presents the current method of waste water treatment in Poland, Gregor Gzyl mapping Polish mines and salinity issues, Dimitris Xevgenos (SEALEAU) and Sandy Chrisostomou (THERMOSSOL) presenting the business / economic aspects and the market exploitation plan of the project in the