Aquaponics, a system of farming that uses no soil, also uses far less water than traditional agriculture. But while the technique is gaining attention, it remains a very niche way to grow produce due to economic limitations. Special correspondent Cat Wise reports from Half Moon Bay, California. View the full story/transcript: http://www.pbs.org/newshour/bb/aquaponic-farming-saves-water-can-feed-country/#transcript