Can natural or anthropogenic explanations of late-Holocene CO2 and CH4 increases be falsified?   Publication Date:   2010-03-30 Creator:   W.F. Ruddiman J.E. Kutzbach S.J. Vavrus Publisher.Display:   Sage Publishing Subjects.Display:   Climate change Land use Agriculture carbon--isotopes Source Institution:   Florida International University Can natural or anthropogenic explanations of late-Holocene CO2 and CH4 increases be falsified?