Yet it is also cautioned, in a report by Forest Research, that any calculation of GHGs through 'productive' woodland creation [including that for biomass substitution for fossil fuels] also needs to account for the emissions generated via forestry 11Morison, J., Matthews, R., Miller, G., Perks, M., Randle, T., Vanguelova, E., … Yamulki, S. (2012).