This book provides a detailed yet succinct overview of sustainable finance, with a specific focus on its origins, its policy focus and the practitioner dimension. With fossil fuel companies still attracting investment and subsidy across the world, the book describes how we can reverse these incentives, using the power of finance to tackle the climate and ecological crises. The world of finance is moving beyond the era of ethical investment and into a future where all financial companies will have to report the climate impact of their investments. This is the first stage towards full-scale ESG reporting (Environmental, Social and Governance). Since financial reporting depends on information provided by companies who receive investment, this has huge implications for non-financial reporting by all large companies. The timeline for these legal changes is short for what will be a transformation of financial accounting and investment. The book also covers the related issues of climate finance and the role of central and public banks in funding the transition to sustainability, and how we can ensure accountability for countries bearing the brunt of the impact from those with the largest responsibility for historic emissions. This book will enable those working in these fields to update their knowledge and skills, and brings together the author¿s practical experience as an MEP with her academic insight as the first professor of green economics.