The Hong Kong Monetary Authority (HKMA) authored the “White Paper on Green and Sustainable Banking” to assist Authorized Institutions (AIs) prepare for the challenges presented by the physical and transition impacts of climate change. Segmented into four sections, this paper addresses the following topics: (i) sustainability and climate change issues, (ii) risks and opportunities that banks in Hong Kong face as a result of climate change, (iii) HKMA’s three-phased approach to promoting green and sustainable banking, (iv) HKMA’s initial views on future regulatory action.