It is estimated that transitioning to a low-carbon and climate resilient economy and more broadly „greening growth‟ over the next 20 years will require significant investment and consequently private sources of capital on a much larger scale than previously - particularly given the current state of government finances. There is already international agreement on the need to increase financing for climate mitigation and adaptation – with international financing commitments already having been made. With their USD 28 trillion in assets, pension funds – along with other institutional investors – potentially have an important role.