Biodiversity means variety among genes, species and ecosystems. Conservation protects living things and habitats. A carbon footprint estimates greenhouse gas emissions linked to an activity, usually in carbon-dioxide-equivalent units. It is not a count of visible smoke or litter. Safety: No electrical equipment or fuel handling. Stop: Stop at comparing the paper proposals. Do not change household equipment, bills or purchases.

Materials: Paper; Pencil 1. Make a word bank: pollution—harmful contamination; habitat destruction—loss of living space; deforestation—forest removal; endangered—at serious risk of extinction; extinct—no living members remain; sustainability—meeting needs while maintaining resources and environmental conditions for the future. 2. Add energy cards: sunlight and wind are renewable; coal, oil and natural gas are non-renewable fossil fuels. Renewable sources are replenished on human timescales. Sort the five cards. Write why renewable does not mean impact-free. 3. Copy two illustrative proposals: A removes woodland for a coal-powered workshop; B keeps the woodland and uses an existing building with some solar electricity. Write one sentence for A using deforestation, habitat destruction, biodiversity and conservation. 4. For B, write a sentence using carbon footprint, renewable energy and sustainability. Then write: neither proposal has supplied emissions totals. Identify two missing facts, such as electricity use and building-material emissions. Do not calculate a winner without data. Done: The page has the energy sort, two applied proposal sentences and two missing-data questions. Proof: Keep the word bank and proposal page. Note whether definitions or sentence openings were supplied. Stop: Stop at comparing the paper proposals. Do not change household equipment, bills or purchases.