Assess students' ability to calculate a household's annual carbon footprint from basic inputs (electricity and heating fuel consumption, vehicle mileage and fuel type, short‑haul flights, and representative consumption/waste patterns) using standard emission factors; require clear presentation of assumptions and step-by-step calculations, and ask students to propose and quantify 3–5 realistic reduction measures (e.g., efficiency upgrades, mode shift, dietary or purchasing changes), estimate annual CO2e savings and simple cost/feasibility trade‑offs, and justify priorities.