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Found 2 datasets matching "ppm_of_carbon_dioxide_in_air".
Timeseries data from 'Middle Tampa Bay LOBO' (tampa_bay_land_ocean_biogeoch_lo)
Timeseries data from 'C12 – WFS Central Buoy, 50m Isobath (NDBC: 42022)' (edu_usf_marine_comps_c12)
data.gov
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