A farm grows willow trees as a crop for biofuel. Each year the trees on the farm add 1200 tonnes of new wood, and 1500 tonnes of wood is cut down. Which statement about this use of the willow is correct?
The willow is used unsustainably because trees cannot be replaced once cut
The willow is used sustainably because it is a natural resource
The willow is used sustainably because biofuel supplements finite fuels
The willow is used unsustainably because it is harvested faster than it regrows
87 exam-style questions on AQA GCSE Chemistry 10.1 Using the Earth's resources and obtaining potable water, covering 10.1.1 Using the Earth's resources and sustainable development, 10.1.2 Potable water, 10.1.3 Waste water treatment, and 10.1.4 Alternative methods of extracting metals. Each one has a worked solution and a mark scheme showing where the marks go.