Bonds are a set of financial products ideally suited to both the financing of long-payback period energy projects and to providing institutional investors with security of returns over the longer term. Climate Bonds are intended to unlock ‘patient capital’: taking savings which require secure returns over long periods of time, such as those held by pension funds, and investing them in low-carbon projects that have high up-front costs but good payback rates over the long term. Climate Bonds need not differ greatly from existing government and corporate bonds, save for their central purpose: the funds they attract are underpinned by real and verifiable energy efficiency and renewable energy projects that in some certifiable manner contribute to the mitigation of climate change. At a minimum this has marketing benefits, allowing investors to report to their members on how their secure investments are also making a contribution to addressing climate change. At a maximum, investors...