title: Atmospheric carbon dioxide at record high.
authors.forename: Nigel
authors.initials: N
authors.lastname: Williams
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D002245:Carbon Dioxide / Q000032:analysis*; D017752:Greenhouse Effect; D008697:Methane / Q000032:analysis*
chemical_list: D002245:Carbon Dioxide; D008697:Methane