 As large parts of the Sunshine State's once-famous citrus industry have all but dried up over the past two decades because of fatal diseases such as greening and citrus canker, some farmers are turning to the pangamia tree. The climate-resilient tree has the potential to produce plant-based proteins and a sustainable biofuel. The trees grow well in drought or rain, and they don't need fertilizer or pesticides. And thanks to a patented process, California-based Turviva has removed the bitterness from the pangamias bean, making it edible. Ron Taylor reporting.