UN: Greenhouse gas levels hit record highs in 2025, locking in long-term warming

The UN reports that atmospheric greenhouse gas concentrations reached new record highs in 2025, committing the planet to centuries of climate impacts. The data confirms a continued upward trend with no sign of peaking, underscoring the gap between policy pledges and actual emissions. This reinforces the trajectory of chronic climate risk, though it is not a discrete market-moving event.

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