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UN Study: CO2 Levels Rise Record Amount

Carbon dioxide levels rose 3.5 parts per million from 2023 to 2024, the highest annual jump since 1957, driven by fossil fuel emissions and weakened natural carbon sinks, the UN said.

  • On Wednesday, the World Meteorological Organization said heat-trapping carbon dioxide rose by the largest annual amount on record last year, reaching levels not seen in human civilization.
  • The report attributed the rise to emissions from fossil fuels and fires, while oceans and land carbon sinks absorbed less carbon dioxide as they weakened.
  • NOAA's global data for this year through June reveal CO2 concentration at 423 ppm, up from 377 ppm and 52% above pre-industrial 278 ppm, with levels still rising though more slowly.
  • The WMO warned that rising CO2 levels last year turbo-charge the climate, while Simon Stiell cautioned the planet is on track for 3°C, urging policymakers to act.
  • A strong El Niño and heat-related fires reduced land carbon storage last year, while WMO senior scientific officer Oksana Tarasova warned of CO2’s long atmospheric lifetime and weakening sinks.
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Levels of heat-trapping carbon dioxide in the atmosphere reached their highest level on record last year, reaching levels never seen in human civilization, "supercharging" the Earth's climate and…

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The Week broke the news in on Wednesday, October 15, 2025.
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