While concessional financing and grants are needed to pilot and demonstrate the business case for green growth, as well as replicate these business models to lower transaction costs, these will only lead to scale up of approaches if they are defined with clear and time-bound exit strategies. Development finance institutions - specialised agencies set up to engage with the private sector for development - have the skills and knowhow to effectively engage the private sector, however, in order for them to play a major role in climate action, their efforts need to move beyond renewable energy to energy efficiency, adaptation, sustainable forestry and agriculture etc. While these organisations and programmes are subject to strong environment and social safeguards systems it is important that private sector engagement goes beyond ‘do no harm’ to ‘do more good’.