The World's Largest LED Hydroponic Farm Used to Be a Sony Factory

As climate change begins posing new challenges to conventional outdoor food production methods, hydroponic farming has made quick gains in popularity thanks to its space- and energy-saving design. This enormous indoor lettuce farm for example--the largest of its kind in the world--produces 10,000 heads a day in less space than a single American football field and could signal a sea change in how we get our greens.