 A unique tree grows where citrus once flourished. An ancient tree from India is now thriving in groves where citrus trees once flourished in Florida and could help provide the nation with renewable energy. 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 pomgamia tree. The climate-resilient tree has the potential to produce plant-based proteins and a sustainable biofuel.