Answer: Russia
Notes: Russia declared a federal-level emergency due to a massive oil spill along the Black Sea coast, caused by storm-damaged tankers near the Kerch Strait. The spill released thousands of tons of mazut (heavy fuel oil), polluting about 55 kilometers (34 miles) of coastline. The spill has raised serious concerns about cleanup efforts and potential long-term environmental damage. The Black Sea, a large inland sea in southeastern Europe, is one of the marginal seas of the Atlantic Ocean, spanning 436,000 square kilometers. It is bordered by Russia, Ukraine, Turkey, Bulgaria, Georgia, and Romania.
