Two desk lamps provide the same amount of light and have the same working lifetime.
The table shows the energy used during the life cycle of each lamp.
| Stage of life cycle | Energy used by lamp A in MJ | Energy used by lamp B in MJ |
|---|---|---|
| Obtaining and processing raw materials | 18 | 26 |
| Manufacturing and packaging | 24 | 30 |
| Transport and distribution | 5 | 6 |
| Use | 360 | 300 |
| Disposal | 3 | 4 |
A retailer claims that lamp A has a lower environmental impact because less energy is used to obtain and process its raw materials.
Evaluate the retailer's claim. 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.