Earth’s Atmosphere Hits Record CO2 Levels: Scientists Raise Alarm

The level of carbon dioxide in Earth’s atmosphere has soared to a record high, reaching 430.2 parts per million (ppm) in May 2025 — a concentration not seen in millions of years. The alarming data, collected at the Mauna Loa Observatory in Hawaii by the Scripps Institution of Oceanography and NOAA, highlights the accelerating pace …

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