TY JOUR TI CONSEQUENCES OF THE FUEL OIL SPILL IN THE BLACK SEA FOR THE TOURISM SECTOR OF RUSSIAN REGIONS KW tourist and recreational activities KW the Azov-Black Sea recreational area KW pollution of beaches KW fuel oil spill KW emergency response KW tourist season 2025 JO MOSCOW ECONOMIC JOURNAL AU Golubyatnikova, E.V. PY 2025 IS 10 PB Electronic science