title: Atmospheric science. How was early Earth kept warm?
authors.affiliation: Geosciences Department, Pennsylvania State University, University Park, PA 16802, USA. jfk4@psu.edu
authors.forename: James F
authors.initials: JF
authors.lastname: Kasting
mesh_terms: D001272:Atmosphere; D018534:Earth, Planet; D057232:Global Warming; D017752:Greenhouse Effect; D006859:Hydrogen / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*
chemical_list: D006859:Hydrogen; D009584:Nitrogen