Farming on the moon or Mars? How recycled sewage could turn regolith into crop soil

Dining on the moon or Mars might seem like a fantasy reserved for science fiction, but researchers are investigating how it could become a reality. Their efforts to recycle plant and human waste into a fertilizer material—turning the barren surfaces of the moon and Mars into fertile fields that might be suitable for extraterrestrial agriculture—are described in ACS Earth and Space Chemistry.