The finding comes as the U.S. reverses rules meant to lower carbon pollution and walks away from international climate treaties.

Last year capped a string of historically hot years, driven by long-term warming and changes in rain patterns.

The year 2025 was the warmest on record for the heat content of the world’s oceans. Ocean heat content (OHC) increased by around 500 zettajoules – billion trillion joules – since the 1940s.

Extreme heat, droughts, storms and deadly floods challenged resilience not only in Australia, but across the globe.

A warming climate doesn't just affect dry land — it affects the ocean, too. For many years, Earth's ocean has acted as a heat sink for climate change: A large part of the heat generated by human use of fossil fuels is being absorbed by the ocean.

Ireland’s exposure to extreme weather is set to increase as latest research by Europe’s climate analysts shows underlying conditions worsening. The Global Climate Highlights report by the EU’s Copernicus climate change monitoring service shows how 2025 was Earth’s third hottest year on record, marking an 11-year streak of temperatures above normal.

Carbon Brief has compiled its annual list of the 25 most talked-about climate-related studies of the past year.

As the Earth warms due to climate change, oceans are heating up, becoming more acidic, and losing oxygen. These changes threaten marine life, food