Grasslands Remove CO2 From the Atmosphere

"Our results show that grazing lands generate soil carbon surpluses that could not only offset rural emissions, but could also partially or totally offset the emissions of non-rural sectors. The potential of grazing lands to sequester and store soil carbon should be reconsidered in order to improve assessments in future greenhouse gas inventory reports."

The above is from a meta-analysis by E.F.Viglizzo, M.F.Ricard, M.A.Taboadaae, and G. Vázquez-Amábilegh

See the abstract here: Reassessing the role of grazing lands in carbon-balance estimations: Meta-analysis and review.