Company reporting and other disclosures necessitate that many boards do engage with sustainability, but this is often at the margin and may be all they do. At minimum, fundamental questions need to be addressed of what sustainability means for the business and what the future holds as sustainability increasingly impacts business inputs and outputs. What are boards really saying about sustainability? What are the obstacles to them taking more effective action? And what changes should be made by boards so that their companies respond more effectively to sustainability challenges?