A private firm is making big money selling promises about some gator-infested Florida swampland.

The Panther Island Mitigation Bank isn’t another land boondoggle, but part of a federal system designed to restore wetlands across the United States. Panther Island’s owners preserved one of the nation’s last stands of virgin bald Cyprus, 4 square miles on the western edge of the Everglades where they cleared away invasive plants and welcomed back wood storks, otters and other native flora and fauna.