UN: Greenhouse Gas Levels Hit New Record Highs in 2025
Greenhouse gas concentrations in the atmosphere rose to new record highs in 2025, locking in climate impacts that will persist for centuries to come, the United Nations said Tuesday. Levels of the three main greenhouse gases -- the climate-warming carbon dioxide, methane and nitrous oxide -- all rose to unprecedented figures in 2025, the UN's weather and climate agency said. The World Meteorological Organization said the rise would lead to more long-term temperature increases for the planet.
