Annual carbon dioxide peak reaches 432 parts per million

PHYSorg
Jun 11, 2026, 4:20 pm183 ptsTrendingTop
Scientists at Scripps Institution of Oceanography at the University of California San Diego reported today that carbon dioxide levels at Mauna Loa Observatory reached 432.00 parts per million (ppm) in May, continuing a long trend of record-breaking annual peak readings.

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