Assess students' ability to apply life‑cycle assessment (LCA) to compare environmental impacts of single‑use versus reusable consumer products by: defining a clear functional unit and system boundaries; selecting relevant impact categories (e.g., GWP, water use, resource depletion); identifying key life‑cycle stages and data needs (materials, manufacturing, transport, use-phase including cleaning, and end‑of‑life); performing simple calculations or qualitative hotspot and sensitivity analyses (e.g., reuse break‑even, cleaning intensity); and interpreting results to justify design or policy recommendations, noting key assumptions and uncertainty.