Greenhouse Gas Concentrations (Worldwide)

Atmospheric concentrations of the major planet-warming gases—carbon dioxide "CO2", methane, and nitrous oxide—all reached new record highs in 2023 (and continued to rise in 2024), committing the planet to rising temperatures for many years.8

• Category: Nature & Environment
• Record Holder: The WMO's Greenhouse Gas Bulletin is the authoritative scientific report that announces these global record concentrations.
• Details: These records are not "held" by a person or a country, but are measured and reported by international scientific organizations, primarily the World Meteorological Organization (WMO) and the National Oceanic and Atmospheric Administration (NOAA).
• Years: 2023
• Providers: NOAA Global Monitoring Laboratory