(FECYT – Spanish Foundation for Science and Technology) The modules that the major space agencies plan to erect on the Moon could incorporate an element contributed by the human colonizers themselves: the urea in their pee. European researchers have found that it could be used as a plasticizer in the concrete of the structures.

Original source: https://www.eurekalert.org/pub_releases/2020-03/f-sf-aut032720.php