Assess students' ability to estimate a household carbon footprint from daily activities—electricity, heating, transportation, diet, and waste—using typical or provided data and simple emission factors (kg CO2e). Require calculations of annual emissions by category, identification of the largest contributors, basic uncertainty reasoning, and development of prioritized, evidence-based reduction recommendations with estimated impacts and feasibility. Evaluate application of unit conversion, proportional reasoning, and clear justification of chosen interventions.