From Hanford (USA) to Osjorsk (Russia), from the plutonium-driven drowned submarines in the world's oceans to the remainders of Project Iceworm under Greenland's moving ice-sheets, legacies of military operations abound. Civil sites such as the overburden heaps of Johannesburg, the Uranium mill tailings of Mailu Suu in Uzbekistan but likewise the Giant Mine's iced down Arsenic piles in Yellowknife (Canada) are among the better known legacies. They pose systemic risks to the future and should receive more attention by scholars and citizens interested in furthering the Sustainable Development Goals. The talk will introduce some sites and discuss the prerequisites for their management.