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How can the availability of water be increased?

How is a rivers usefulness determined?

How is the usefulness of a river determined?

What are the 3 main environmental effects of reservoirs?

What is an aquifer?

What are the main features of aquifers?

What are the 5 consequences of overuse of aquifers?

What are the 8 steps for freshwater treatment, explain each one?

What are the 2 ways of desalinating sea water?