Peter Coates reflects on multi- and interdisciplinarity within environmental history. He categorizes multidisciplinarity as basic cooperation, interdisciplinarity as a more challenging integration, and transdisciplinarity as the most demanding and transformative of the three. Coates celebrates environmental history as a model for multi- and interdisciplinary success, rejecting disciplinary boundaries and embracing the so-called methodological impurity. He explores “indisciplinarity” and “ill-disciplinarity,” advocating for porous intellectual boundaries that absorb insights from diverse disciplines. Coates sees promise in the emerging environmental humanities, emphasizing its hybrid vigor and ability to challenge anthropocentric perspectives. He critiques academic structures that hinder interdisciplinary work and calls for broader recognition of cultural values in environmental scholarship, possibly moving towards ecological humanities or beyond.