May 2018: This discussion paper aims to pave the way for the development of a framework for assessing and moving forward the “contribution of green bonds to scaling up the investments in green projects”. The paper focuses on the case of ‘Use-of-Proceeds Green Bonds’ (UoP GB) that represent 95% of the market in 2016. It discusses the link between increasing investment in UoP-GB on the one hand, and the growth of investments in green projects by issuers on the other hand, suggesting how this approach can be enhanced to achieve further impact.