Why does some coastal cities/counties have a problem of lacking drinking water?

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Like California and South Africa, isn’t the principle of water distillation relatively easy? evaporating from one end and cooling it from the other so that it becomes liquid again, leaving all the salt and pollutants behind.

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Anonymous 0 Comments

The principal of water distillation is easy. The execution is hard.

You need to boil the water. This means spending energy to heat it, or spending energy to generate a partial vacuum.

The amount of energy spent is typically far more expensive than people are willing to pay for water, so it isn’t done.

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