UN Weather Agency Warns Record CO₂ Levels Will Lock In Centuries‑Long Warming
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The World Meteorological Organisation reported that global CO2 concentrations reached 426.8 ppm in 2025. This level is expected to drive climate impacts for many decades. The agency warns that these record levels will cause warming to persist for centuries.
The World Meteorological Organisation says 2025 saw a global CO₂ concentration of 426.8 ppm, a level that will drive climate impacts for decades and centuries.