Two materials, R and S, can cover the same area of flooring for the same length of time.
Two groups carry out life-cycle assessments of the materials. The groups use the same measurements but independently assign environmental impact scores to the pollutants released. All other environmental impact scores are equal. A lower score represents a lower environmental impact.
| Material | Environmental impact score assigned by group 1 | Environmental impact score assigned by group 2 |
|---|---|---|
| R | 18 | 48 |
| S | 25 | 35 |
Explain why the two groups reach different conclusions about which material has the lower environmental impact. Use data from the table.
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.