Radioactive Waste 2 topics · 2 sources ScienceEnergyMaterials left over from making nuclear energy. Radioactive waste can living organisms if it is not stored safely.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite ScienceNuclear PhysicsMaterials which are radioactive and for which there is no further use.Nuclear Science Division, Lawrence Berkeley National Laboratory — Glossary of Nuclear Science Terms retrieved 2014-05-20 Cite