title: Warming early Earth and Mars
authors.affiliation: Department of Geosciences, The Pennsylvania State University, University Park 16802, USA.  kasting@essc.psu.edu
authors.forename: J F
authors.initials: JF
authors.lastname: Kasting
mesh_terms: D001272:Atmosphere / Q000737:chemistry; D002245:Carbon Dioxide / Q000032:analysis / Q000737:chemistry; D002980:Climate; D018534:Earth, Planet; D019419:Evolution, Planetary; D005118:Extraterrestrial Environment; D017752:Greenhouse Effect; D018535:Mars; D008697:Methane / Q000032:analysis / Q000737:chemistry*
chemical_list: D002245:Carbon Dioxide; D008697:Methane