Test learners' ability to estimate a household's annual carbon footprint by calculating emissions from home energy (electricity, heating, appliances), personal and shared transport (vehicle fuel, public transit, air travel), and diet (food choices, meat/dairy vs plant-based). Assess use of emission factors, simple conversion methods and stated assumptions, require one short calculation, interpretation of results, and a prioritized, practical action plan proposing measurable reduction strategies (efficiency upgrades, behavior change, modal shift, diet changes) with estimated emission savings.