To do this, I discuss and dissect the case of the Semakau Landfill. Specifically, I draw attention to how certain environmental design features of the Semakau Landfill raised different ethical issues inte-gral for a fuller understanding of wicked urban waste problems. Following this, I evaluate these issues by drawing on ethical con-cepts from environmental and design ethics. It is uncertain to what extent my discussions based on a specific and singular case study are generalizable. But on introspection, my discussions are also suf-ficiently broad such that there should be – or so the author hopes – more than a few relevant concepts, categories and arguments that could be mined for future study in this important area bounded by ethics, environmental design and the wicked urban waste prob-lem.