Curt Anderson, Marta Lavandier and Daniel Kozin | Associated Press

Florida boasts at least 1,000 freshwater springs, more than any other U.S. state. They are all under threats from agricultural pollution, stress from rapid development and from climate change that is altering rainfall patterns and causing sea level rise. Some places, such as the town of Zephyrhills in west-central Florida, have imposed moratoriums on specific kinds of new construction just to slow things down.