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Fil:Historical CO2 levels based on proxy (indirect) measurements.png

Historical_CO2_levels_based_on_proxy_(indirect)_measurements.png(674 × 508 pixlar, filstorlek: 79 kbyte, MIME-typ: image/png)

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English: This graph shows CO2 (carbon dioxide, a "greenhouse gas") levels during the last three glacial cycles, as reconstructed from ice cores. Based on research and data from the National Oceanic and Atmospheric Administration (NOAA)
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https://climate.nasa.gov/resources/graphics-and-multimedia/ https://climate.nasa.gov/scientific-consensus/

https://climate.nasa.gov/vital-signs/
Skapare Earth Science Communications Team, Jet Propulsion Laboratory/California Institute of Technology, National Aeronautics and Space Administration (NASA), 4800 Oak Grove Drive, Pasadena, CA 91109; (818) 354-4321

From NASA’s Global Climate Change website - https://climate.nasa.gov/vital-signs/carbon-dioxide/

Licensiering

Public domain Denna fil är allmän egendom eftersom den skapades av NASA. NASA:s upphovsrättspolicy hävdar att "material från NASA inte är upphovsrättsskyddad om inte annat anges". (Se Template:PD-USGov, NASA:s upphovsrättspolicy eller JPL-bildanvändningspolicy.)
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nuvarande18 augusti 2018 kl. 16.05Miniatyrbild för versionen från den 18 augusti 2018 kl. 16.05674 × 508 (79 kbyte)MarkworthenUser created page with UploadWizard

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