Online annex: Inter-agency Task Force on Financing for Development (https://developmentfinance.un.org). Range of estimates of main proposed and existing innovative sources of development finance ,New issuance SDRs,Carbon taxes,Leveraging SDRs,FTT,CTT,EU trading scheme,Air passenger levy,CER tax,Current ODA flow Lower bound,150,25,100,15,40,0,0,0,0 Upper bound,200,225,0,63,0,0,0,0,0 Existing,0,0,0,0,0,17.5,6,0.5,140 Chart downloaded on 2019-10-17 18:55:53 from https://developmentfinance.un.org based on data from UN/DESA, WESS 2012