Slide 24: Greenhouse gases: nitrous oxide
Atmospheric nitrous oxide concentrations seem to follow a similar trend. Nitrous oxide (N2O) is naturally produced by biological functions in the soil and oceans. Anthropogenic sources include industrial combustion, vehicle exhausts, biomass burning and the use of chemical fertilisers. The forcings relative to 1765 show a similar trend to methane, rising form less than 0.03Wm-2 in 1900 to 0.1 in 1990.