This technical paper synthesizes submissions by Parties and other available information relevant to the determination of the mitigation potential and to the identification of possible ranges of emission reduction objectives of Annex I Parties. To arrive at an accurate estimate of the mitigation potential at the level of individual countries, much more information is needed than is currently available. This paper presents some options for further analyses and compiles some of the most important national and sectoral mitigation factors and indicators and provides data which can be used in the identification of possible ranges of emission reduction objectives of Annex I Parties