Florida has some of the most renowned springs in the world - famed for both their number and the clarity of the water. But ongoing residential development and nutrients flowing into the underground aquifer have combined to cloud the future of the springs. Thick green algae is now found where there were once gin-clear waters. We talk with Dr. Tom Crisman, a freshwater ecologist at the University of South Florida in Tampa, Dr. Chris Anastasiou, springs team leader at the Southwest Florida Water Management District and Craig Pittman, environmental reporter for the Tampa Bay Times.