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  • Rights: NOAA, John Miller/ NOAA Mauna Loa Observatory archive Published 31 January 2017 Size: 4.4 MB Referencing Hub media

    Dave Keeling accurately measured COin the atmosphere on Mauna Loa in Hawaii and detected an annual rise. In 1960, COin the atmosphere was 315ppm (parts per million) and the mean global temperature was 13.9°C.

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