This book presents topical research data in the study of the Black Sea, including the influence of the Danube River on the trophic functioning of coastal ecosystems in the north-western Black Sea; the ecotoxicological study of the Sevastopol region of the Black Sea; the environmental matrix and the impact of pollutants on marine organisms in the Black Sea; water resources, general seismicity, hydrocarbon generation and environmental problems of the Black Sea.