Why is a life cycle assessment not a purely objective process?
The mass of waste produced at each stage cannot be measured
The energy used in manufacturing changes from day to day
Giving numerical values to pollutant effects needs judgement
The volume of water used in a factory is never recorded
40 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.