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WMO Reports Greenhouse Gas Concentrations Hit Record Highs in 2025
The UN WMO reported that greenhouse gas concentrations set new records in 2025. With carbon dioxide lingering for centuries, the resulting warming and extreme weather impacts could persist long-term.
The UN World Meteorological Organization (WMO) released its 22nd Greenhouse Gas Bulletin, stating that carbon dioxide, methane, and nitrous oxide concentrations set record highs in 2025, reaching 153%, 267%, and 126% of pre-industrial levels. WMO emphasized that carbon dioxide persists for centuries, locking in long-term warming and fueling extreme weather, while emissions show no sign of slowing.
Key takeaways
- WMO reported 2025 levels of carbon dioxide, methane, and nitrous oxide reached record highs of 153%, 267%, and 126% of pre-industrial benchmarks.
- WMO officials stated that carbon dioxide persists in the atmosphere for centuries, locking in long-term warming and fueling extreme weather systems.
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