{
  "packet": "cenv-noaa-mlo-2020-2021@1",
  "source": "https://gml.noaa.gov/webdata/ccgg/trends/co2/co2_mm_mlo.txt",
  "source_created": "2026-10-09 13:08:07",
  "retrieved_utc": "2026-10-30",
  "source_sha256": "0ce4e7749217b4af2cca8e0bdf263856ad59b0a2946d4e98c7b22ccfbff21cad",
  "terms": "https://gml.noaa.gov/about/disclaimer.html",
  "reuse": "NOAA government data public domain unless otherwise annotated; credit NOAA GML and dataset providers, do not imply endorsement or present modified analysis as official. This subset is from the NOAA-era record; original source acknowledges earlier Scripps observations.",
  "transformation": "Selected all 24 rows with years 2020 or 2021; retained all eight source columns, renamed headers for explicit units. No values changed. Numeric formatting and delimiter differ.",
  "analysis_boundary": "Equal-month descriptive comparison, not NOAA official annual estimate, emissions measurement or causal intervention estimate."
}