Russian strike on Chornomorsk port caused sunflower oil spill in Black Sea. December 2025 strike on Illichivsk Oil and Fat Plant identified as part of 'documented scheme'. Authorities estimate 6,000 tons spilled, but co-owner claims 1,000 tons with containment booms. 400x200-meter oil slick threatens migratory birds due to vegetable oil's greater damage. Inspectors collect seawater samples for pollution analysis and long-term impact monitoring