The higher education community has unique opportunities to influence the citizens of tomorrow and to test nudges in real-world laboratories. “The Little Book of Green Nudges” shares a practical framework and 40 nudges that can be adopted by colleges and universities, from the small-scale to the large, depending on your resources and context. By embracing this approach, leaders and activists on campus can facilitate more sustainable decisions and help reduce the approximately 75 per cent of personal emissions that come from what we eat, how we travel and the homes we live in.3 This book does not contain all the answers on how best to change behaviour in every circumstance. Nudging projects will play out differently in different parts of the world, on different types of campuses, and among different genders and cultural groups. But everyone can learn from insights gained along the way.