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Observatory buildings on a bare volcanic slope Brian Vasel/NOAA, public domain

Greenhouse gas levels reached new records in 2025, WMO bulletin says

Carbon dioxide averaged 426.8 parts per million at the Earth's surface last year, the World Meteorological Organization said on 27 October, with methane and nitrous oxide also at record highs.

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    Greenhouse gas levels reached new records in 2025, WMO bulletin says

    Carbon dioxide averaged 426.8 parts per million at the Earth's surface last year, the World Meteorological Organization said on 27 October, with methane and nitrous oxide also at record highs.