public concessional funds flowing from developed to developing countries to address climate change are estimated to be usd billion per year in of this funding for adaptation is estimated to be only a small fraction annual financial flows for adaptation are estimated to be on the order of usd to usd million per year oecd la corfeemorlot et al each member country had its own interpretation of this concept and would not likely agree on a common baseline against which to establish additionality the dac has an active role to play in helping to clarify key concepts and relevant terminology to facilitate a dialogue on this issue see for example enting and ilarmeling and further discussion in section