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Water treatment, resource use and sustainable materials

Analysis, environment and practical skills · Lesson 5 of 6

Lesson 5 of 6

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Lesson 5 of 6 · Analysis, environment and practical skills

Water treatment, resource use and sustainable materials

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By the end you’ll be able to

describe how potable water can be produced from fresh water sources by filtration and sterilisation, and explain why desalination is used where fresh water is limited
describe the main stages of sewage and wastewater treatment, including screening, sedimentation, aerobic biological treatment and safe handling of sludge where specified

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distinguish between finite and renewable resources and apply these ideas to fuels, metals, water and manufactured materials

evaluate the benefits and drawbacks of reusing and recycling materials, including reduced energy use and conservation of raw materials balanced against costs, collection and processing

apply life-cycle assessment ideas to compare products or materials, considering extraction, manufacture, use and disposal, while recognising that such assessments depend on the data and weighting used

explain why reducing resource use, choosing sustainable materials and minimising waste are important for environmental sustainability

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