GHGs (CO2, CH4, and N2O) have increased steadily during the past century.Soil organic matter (SOM) contains a large reservoir of sources for GHGs.Human-enhanced erosion through cultivation and land clearing is ubiquitous and increasing.Erosion accelerates SOM decomposition.SOM decomposition releases CO2, CH4, and N2O.Accelerated erosion is a source of GHGs by enhancing SOM decomposition.