title: Global change: probing early atmospheres.
mesh_terms: D001272:Atmosphere; D002244:Carbon / Q000032:analysis / Q000378:metabolism; D002245:Carbon Dioxide / Q000032:analysis* / Q000378:metabolism; D002247:Carbon Isotopes; D002681:China; D056890:Eukaryota / Q000737:chemistry*; D005580:Fossils; D013997:Time Factors
chemical_list: D002247:Carbon Isotopes; D002245:Carbon Dioxide; D002244:Carbon