Model for the following tasks — original teaching text
A: What should we do with all this spare paper?
B: You should check whether it is clean on one side.
A: Some sheets contain names and marks.
B: Then ask the teacher to dispose of those securely. Use only the other sheets for rough work.
Culture / CLIL reference notes
Carbon footprint is an estimate of greenhouse-gas emissions associated with an activity, expressed as carbon-dioxide equivalent. It is broader than visible litter. A reusable object still has production impacts, so repeated use and avoiding unnecessary purchases matter. Comparing footprints requires a stated boundary, time period and method; counting cups alone is not a complete footprint calculation.