Moon base: Astronaut urine could be used to construct lunar colonies - 'Very practical'

Even the International Space Station (ISS), which recycles more than 90 percent of all water, needs to be resupplied from Earth.

But launching water, fuel, food and building materials to the Moon is incredibly costly and ineffective.

However, Ms Marlies said urea should be "incredibly cheap and readily available" to astronauts.

By combining urea with lunar regolith - the powdery layer of soil on the Moon's surface - superplasticiser can be created with a limited amount of water necessary.

Urine also contains many calcium minerals, which can help in the curing process.

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