The theme of the book "Flush" by Carl Hiassen is that you should put your all into protecting your enviroment. I think this because in the book Noah Abbey and they're dad try to stop the coral queen. They want to stop the corral queen because the guy who owns it Dusty Muleman is dumping the sewage from the coral queen party boat into the ocean right where everybody swims. The Three people try to stop this boat but the beach guard is on the dumping and wont let the three people on the beach to stop the boat. That is the theme of the book "Flush" by Carl Hiassen