<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
  <gcmd:gcmd>
    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>23.7</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-04-15T10:53:30.610Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/7c892333-f4c4-4f81-b825-d6a86e107e9f</gcmd:viewer>
  </gcmd:gcmd>
  <skos:Concept rdf:about="7c892333-f4c4-4f81-b825-d6a86e107e9f">
    <skos:broader rdf:resource="19ab681c-bdd7-4793-bbdb-1ec498575314"/>
    <skos:prefLabel xml:lang="en">METHANE</skos:prefLabel>
    <skos:changeNote>Date=2026-02-18 User Id=system System Note=Added narrower relation from METHANE [7c892333-f4c4-4f81-b825-d6a86e107e9f] to METHANE CONCENTRATION [e3472035-3f48-4350-adbd-f57e79b29349]</skos:changeNote>
    <skos:changeNote>Date=2026-02-18 User Id=system System Note=Added narrower relation from METHANE [7c892333-f4c4-4f81-b825-d6a86e107e9f] to METHANE EMISSION RATE [9052eb78-103a-47ab-84a4-90c0c6b1da2a]</skos:changeNote>
    <skos:changeNote>Date=2026-02-18 User Id=system System Note=Added narrower relation from METHANE [7c892333-f4c4-4f81-b825-d6a86e107e9f] to METHANE FLUX [900f9c46-3b70-4b4e-8131-503b186e2595]</skos:changeNote>
    <gcmd:reference gcmd:text="Atmospheric and Air Chemistry Glossary from the Sam Houston State University. &apos;http://www.shsu.edu/~chemistry/Glossary/glos.html&apos;" xml:lang="en"/>
    <skos:narrower rdf:resource="e3472035-3f48-4350-adbd-f57e79b29349"/>
    <skos:narrower rdf:resource="9052eb78-103a-47ab-84a4-90c0c6b1da2a"/>
    <skos:narrower rdf:resource="900f9c46-3b70-4b4e-8131-503b186e2595"/>
    <skos:definition xml:lang="en">Methane (CH4) is a colorless, odorless, flammable, greenhouse gas. It
is released naturally into the air from marshes, swamps, rice
fields, ruminant animals (such as cattle), and sewage sludge.  CH4 is
also released from methane-producing bacteria (methanogens) that live
in anaerobic places. [Solar Energy; v52n6; 467-477; 1994.] [Air, The
Nature of Atmosphere and the Climate; Michael Allaby; pages 39,40;
1992; Facts on File; New York] [Dictionary of Science;	R.K. Barnhart;
page 398; 1986; Houghton Mifflin Company; Boston.]</skos:definition>
    <skos:inScheme rdf:resource="https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords"/>
  </skos:Concept>
</rdf:RDF>