Greece's Council of State will examine petitions seeking to overturn environmental approval for a carbon storage project in the Prinos oil field, located in waters off Kavala. The case brings together Thasos municipality, local environmental organizations, and over fifty civil society groups challenging the licensing decision. Petitioners have raised public objections to the development, citing environmental and sustainability concerns about storing industrial CO2 in the marine field. The high court's September 2026 hearing will determine whether the environmental permits issued for the project can withstand legal scrutiny. The outcome of this case could set important precedent for similar industrial projects in the region.