The document summarizes a collaboration between ETH Zurich and Harvard to conduct peer reviews of their sustainability practices and annual reports. It identifies positive aspects of Harvard's sustainability report including its design, data transparency, and storytelling. Areas for improvement include having fewer goals, addressing positive bias, including more voices, and making comparability easier. The benefits of peer exchange are outlined as sharing challenges, independent review, building trust, and learning from each other. Lessons on planning effective exchanges include preparation, communication, logistics, building early trust, and continued follow up.