Scrap steel is added to the iron made in a blast furnace. What is the main advantage of doing this?
The steel that is produced contains no carbon at all
The blast furnace can be run without using any coke
Less iron has to be extracted from limited iron ore
No carbon dioxide is released by the blast furnace
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.