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Distillation for potable water
The Earth’s natural resources are used to manufacture useful products. One useful product is potable water.
Potable water can be produced from sea water by distillation.
Give one disadvantage of using distillation to produce potable water.
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Marking points
- 1 States that distillation requires large amounts of energy.
Full-mark answer
Distillation requires a large amount of energy.
Why this answer loses marks
It takes a long time or costs a lot.
The official scheme ignores time and cost; identify the large energy requirement instead.