A manufacturer replaces recycled aluminium recovered from old saucepans with aluminium newly extracted from ore to make the same number of garden chairs. What effect does this change have?
More of the finite aluminium ore is consumed, and more energy is used to obtain the metal.
Less energy is used because extracting the aluminium avoids collecting and sorting old saucepans.
Less aluminium ore is consumed because the new chairs can still be recycled after use.
The same amount of aluminium ore is consumed because each chair contains the same mass of metal.
99 exam-style questions on AQA GCSE Chemistry 10.2 Life cycle assessment and recycling, covering 10.2.1 Life cycle assessment and 10.2.2 Ways of reducing the use of resources. Each one has a worked solution and a mark scheme showing where the marks go.