Farming is difficult in areas that lack freshwater. To help solve this problem, The Seawater Greenhouse Company has created something new—“cooling houses” in Somaliland, Africa, and other countries with similar climates. Cooling houses use solar pumps to drizzle saltwater over walls made of corrugated cardboard. As the water moves down each panel, it leaves its salt behind. Much of the remaining fresh water evaporates inside the structure, which becomes a humid place where fruit and vegetable crops can flourish.

Through the prophet Isaiah, God promised to do a “new thing” as He provided “streams in the wasteland” for ancient Israel (Isaiah…