The world’s oceans are facing a deepening environmental crisis, according to the United Nations’ Third World Ocean Assessment released on World Oceans Day. The report warns that human activities, including climate change, pollution, and industrial-scale fishing, are placing marine ecosystems under “severe and accelerating” stress.
One of the most alarming findings is that the rate of global sea-level rise has more than doubled over the past decade. Before 2015, sea levels were rising at approximately 2 millimetres per year. By 2023, that rate had increased to 4.3 millimetres annually. Scientists attribute this acceleration primarily to the melting of glaciers and ice sheets, along with the thermal expansion of warming seawater.
The assessment, compiled by nearly 600 experts from 86 countries, also found that about 16 percent of the total increase in ocean heat since 1955 has occurred since 2018 alone. Rising ocean temperatures are disrupting marine ecosystems, contributing to coral bleaching, biodiversity loss, and more intense coastal flooding.
United Nations Secretary-General António Guterres urged governments to act collectively, stating that humanity can no longer treat the ocean as an unlimited resource. The report calls for stronger international cooperation to reduce pollution, combat climate change, protect marine habitats, and ensure the long-term health of the world’s oceans, which regulate climate and support billions of people worldwide.
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