Rio markers could move towards a more exact definition and quantification by moving away from the binary classification approach and towards a percentage allocation for each project. The DAC could follow the lead of the World Bank Group, as they are currently working towards tracking the adaptation and mitigation ‘co-benefits’ of their investments, based on a percentage of each sub-sector in each investment, across their entire portfolio and all core funding sources.60 Australia is also testing such a system. For the definition of the Rio marker for adaptation: www.oecd.org/dataoecd/l/45/45303527.ndf (page 5). These will be based on a series of vetted investment activity typologies.