The Ohio Sustainable Farm Tour and Workshop Series continues Friday at Project AquaStar in Columbus’s Linden neighborhood. The project “is a multifaceted aquaponics, waste reduction and composting business enterprise,” the tour description says. “The site includes an aquaponics system utilizing six 1,200-gallon tanks. … Tilapia fish are produced in the system in an effort to help address food insecurity in the Linden community.” Details (PDF, p. 31). (Photo: Project AquaStar.)