1. Carbon sequestration and biomass energy offset: theoretical, potential and achievable capacities globally, in Europe and the UK
2. CSA. 2008. “Summary and statistical report of the 2007 Population and Housing Census, population size by age and sex”. Federal Democratic Republic of Ethiopia Population Census Commission, December, Addis Ababa
3. De Pinto, A., Magalhaes, M. and Ringler, C. 2010. “Potential of carbon markets for small farmers – a literature review”. Internal Food Policy Research Institute, Environment and Production Technology Division, Discussion Paper 01004