Waste glass bottles of mixed colours can be crushed and used in road surfaces instead of being made into new bottles.
Why is this a viable way to recycle the glass?
Crushing glass needs less energy than melting it, and the colours do not need sorting.
Crushed glass is biodegradable, so it breaks down safely inside the road surface.
Glass is a polymer, so it can be melted and reshaped as many times as needed.
Crushed glass is soft and flexible, so it stops the road surface from cracking.
61 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.