A sprawling reservoir at the heart of the $27 billion effort to restore Florida’s Everglades is unprecedented in size, but a new report suggests much more reservoir space is needed.By Amy GreenA sprawling reservoir under construction south of Lake Okeechobee that Gov. Ron DeSantis has characterized as the ‘crown jewel’ of Everglades restoration will not be enough to save Florida’s treasured and troubled river of grass, according to a new report.