Urgent leadership is needed from corporate boards to address climate change risks and opportunities. The document outlines three key duties of boards: 1) act in the interests of all stakeholders, not just shareholders, 2) exercise due diligence on physical, legal and reputational climate risks, and 3) comply with climate-related disclosure requirements. Boards must acknowledge the transition underway and help their companies play a critical role in securing a sustainable world. Specialized training programs can help equip boards to ask the right sustainability questions of management.