the share of nitrous oxide in total afolu emissions is small but accounts for as much as percent of global anthropogenic emissions of the gas organic soils those with a high concentration of organic matter such as peatlands and the burning of biomass eg savanna fires account for relatively smaller amounts of emissions forests also mitigate climate change by removing ghg from the atmosphere through forest growth as seen in the negative values however the average contribution of forests to carbon sequestration has fallen from gt annually in the s to gt in the s and is estimated at gt in