Green is definitely "in." Green refers not to fashion but the philosophy of environmental protection, stewardship, and social justice. There is nothing new about the green philosophy for tribal colleges and universities (TCUs) and the Native communities they serve. Responsible stewardship of Mother Earth is a natural outgrowth of TCU's missions and speaks to the worldview of most tribal peoples: recognizing and valuing the inter-relationship of all living things on earth. Green practices in the tribal college community vary as much as the institutions themselves. The examples discussed in this article demonstrate the potential, the challenges, and how the tribal colleges' approach differs from most mainstream colleges' approach. Colleges with enough money to build new campuses obviously have advantages over colleges that must use older, existing buildings, but these examples demonstrate that every one can implement a strategy.