In 2010 and 2011, climate-related aid commitments3 reported to the OECD DAC4 ranged on average from USD 12.8-21.1 bn per year (based on lower and upper bound estimates), representing up to 16% of total ODA. Going forward, climate-related ODA is expected to remain both significant and substantial given its potential to mobilise other sources of climate finance and given the internationally-agreed target of devoting 0.7% GNI to ODA). Going forward the definition of public climate finance and consistency with OECD DAC Rio markers is to be determined.