The UN weather agency said ocean heat reached record levels in 2025, while glaciers kept retreating and sea levels continued to rise. WMO officials also said concentrations of carbon dioxide, methane and nitrous oxide hit record highs in 2024, the latest year with consolidated global data, and preliminary observations suggest those levels kept increasing in 2025. The findings add to mounting evidence that greenhouse gas emissions are continuing to alter the planet, fueling higher temperatures and accelerating long-term changes to the atmosphere, oceans and the ice caps.
