A council is choosing between paving materials R and S. The materials cover the same area and have the same working life.
The table shows life cycle assessment data for each material. The landscape change score is on a scale from 0 (least effect) to 10 (greatest effect).
| Paving material | Carbon dioxide released in kg per m² | Landscape change score |
|---|---|---|
| R | 22 | 8 |
| S | 31 | 3 |
Two consultants study the same data. Consultant 1 recommends material R. Consultant 2 recommends material S.
Explain why the two consultants recommend different materials and why this shows that a life cycle assessment is not purely objective.
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.