Greenhouse gas levels hit record highs in 2025, locking in centuries of climate change: UN
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The UN reports that carbon dioxide, methane, and nitrous oxide reached record concentrations in 2025. These levels are locking in further global warming. The resulting climate impacts are expected to last for centuries.
Record concentrations of carbon dioxide, methane and nitrous oxide in 2025 are locking in further global warming, with climate impacts expected to persist for centuries, the UN says.