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Data for Atmospheric Methane (CH4) |
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Instrument record for methane (CH4) from the Mauna Loa Observatory:
NOAA Publication of July 15, 2008: ftp://ftp.cmdl.noaa.gov/ccg/ch4/in-situ/mlo/mlo_01C0_mm.ch4
NOAA | Greenhouse gases continue to climb despite economic slump | Apr 2009
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