Atmospheric CO2 Levels Reach Record Highs, Continuing Upward Trend

Wed, 06 May 2026 14:15:00 +0200

In April 2026, atmospheric carbon dioxide (CO2) levels reached a new high, averaging around 431 parts per million (ppm) at NOAA's Mauna Loa Observatory. This marks a significant increase from under 320 ppm when measurements began in 1958, highlighting the ongoing rise of greenhouse gases. Climate scientist Zachary Labe of Climate Central describes the record as 'depressing' but not surprising, emphasizing that it reflects the persistent growth of CO2 as global temperatures rise. Seasonal patterns contribute to the peak in April, as decaying vegetation releases CO2 after winter, some of which is later absorbed by growing plants. While U.S. emissions saw temporary reductions in 2023 and 2024, 2025 showed an uptick, partially due to increased electricity demand from artificial intelligence data centers. Despite these challenges, Labe notes reasons for optimism, citing the expansion of renewable energy sources such as wind and solar. The article also highlights public discussions and conce