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UN News - Global perspective Human stories reports: Levels of carbon dioxide (CO2) and other major greenhouse gases in the atmosphere caused by burning fossil fuels reached record highs in 2025, locking in more long-term global warming, the World Meteorological Organization (WMO) said on Tuesday. The agency’s latest Greenhouse Gas Bulletin indicates an average global concentration of CO 2 at 426.8 parts per million (ppm) last year, or 153 per cent of the 1750 pre-industrial baseline. “Every additional part per million matters because it traps additional heat. In effect, we are supercharging the ocean and the atmosphere.
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