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The Keeling Curve

keelingcurve.bsky.social

did:plc:rp3fspydnlivnhkcqjyemf2j

430.13 parts per million (ppm) CO2 in air 21-Jun-2025 keelingcurve.ucsd.edu https://keelingcurve.ucsd.edu/

2025-06-22T17:09:24.337Z