In a rooftop greenhouse near downtown Denver, cash crops are thriving on hydroponic life support. Arugula. Chard. Escarole. Cabbage.
“And basil,” said Altius Farms CEO Sally Herbert, plucking a bright leaf. “Which you really should taste. Because it’s magnificent.”
Still, vertical farms use 95% less water than traditional farming. Other benefits can include reduced transportation costs, with produce grown closer to where consumers live. And foods that can be grown indoors can be a boon outside of temperate regions, said Michael Dent, an agriculture and food technology analyst at the IDTechEx market research group.
“But when it comes to water savings, I’m actually very confident in saying that we use only 3% of the water traditional agriculture would use,” Schwarz said.At a home construction site, a plumbing crew huddled around a black, refrigerator-size piece of technology. “Plumbing codes, ordinances, local regulations are just catching up to that technology availability,” said Pat Sinicropi, head of the WateReuse trade association.
The idea isn’t new. Singapore has been treating sewage and recycling the water back into its reservoirs since 2003. San Diego, California, is building sewage recycling infrastructure. And Cath’s desert homeland of Israel is a world leader in desalinating seawater for drinking and treating wastewater for irrigation use.
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