Human influence is placing increasing pressure on the world’s oceans. According to a UN report published on Monday, the rate of sea level rise has doubled in the past decade, prompting the United Nations to describe the findings as “devastating.”
Pollution and industrial fishing pressures are mutually reinforcing, according to the report, leading to mass biodiversity loss and placing the oceanic ecosystems “under severe strain.” This assessment was part of the UN’s third Global Ocean Assessment, which involved nearly 600 scientists from 86 countries studying oceanic conditions between 2021 and 2025. Even the previous assessment had noted a persistent decline in the health of the seas.
Five years later, the understanding of the consequences of human interference has grown significantly, with the current report showcasing how rapidly damage has escalated. Key conclusions include: the acceleration of rising sea levels; the rate stood at two millimeters per year before 2015 but had reached 4.3 millimeters by 2023; and 16 percent of global ocean warming since 1955 is attributed solely to the period after 2018. The most intense warming has been recorded in the Atlantic, as well as in the southern parts of the Indian and Pacific Oceans.
Despite these dangers, significant knowledge gaps persist. Only 27 percent of the seafloor has been mapped, meaning deep-sea ecosystems remain largely unexplored. UN Secretary-General Antonio Guterres stressed the urgency of the situation, stating, “We must stop treating the ocean as an inexhaustible resource. Global cooperation is urgently needed to protect marine ecosystems.”
The report also highlighted areas of positive development, such as the groundbreaking High Seas Treaty, which entered into force this year. This treaty establishes international rules for protecting the two-thirds of the world’s oceans lying outside national jurisdictions. Together with 56 other agreements, this treaty and its related accords have improved global capacity to protect biodiversity, reduce harmful subsidies, and ensure sustainable resource use. However, the control over these efforts across different sectors and regions remains “fragmented,” and improved coordination is deemed “crucial.”
