WMO: Greenhouse Gas Concentrations Hit Record High in 2025

The WMO bulletin matters less as a new data point than as confirmation that the atmospheric stock of heat-trapping gases keeps rising regardless of short-term emissions trends, since concentrations reflect accumulated history rather than any single year's output. This bears on the physical baseline that carbon markets and climate-exposed assets are ultimately priced against, even though the bulletin carries no direct market mechanism. Whether the record-setting pace described in the report is sustained in subsequent bulletins is the open question worth tracking.