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Card 6
Front
Why is chlorine added during water treatment?
Back
Card 7
Front
What is the last stage in the water cycle so it can be pumped into our homes?
Back
Card 8
Front
Why is distillation an expensive process?
Back
Card 9
Front
What is flash distillation?
Back
Card 10
Front
What is desalination?
Back
Card 11
Front
What is reverse osmosis?
Back
Card 12
Front
What is the first stage of sewage treatment?
Back
Card 13
Front
What is the second stage of sewage treatment?
Back
Card 14
Front
What is the third stage of sewage treatment?
Back
Card 15
Front
What is the fourth stage of sewage treatment?
Back
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