Columbia Department of Environmental Health Science Microbiologist Dr. Dickson Despommier breaks down the science nonfiction idea that he says is a key component to any serious solution to the Earth’s growing population pressures: Vertical Farms, urban skyscrapers housing productive, efficient, sustainable, and extremely local agriculture for an increasingly urbanized world: "Over the next 50 years there’ll be 3 billion more people on this planet." Are Vertical Farms part of the answer? Dr. Despommier gives his take (yes), and points out that these structures can also serve as water treatment plants and other valuable public infrastructure. LISTEN (8 min)