What is the main conflict in The Everglades: River of Grass by Marjory Stoneman Douglas?

The Everglades: River of Grass is written by Marjory Stoneman Douglas, who is a champion of environmental concerns regarding the Everglades. This fascinating book tells the history of the Everglades and the people of the Everglades. The author is the person who focused attention on the Everglades and how it was being destroyed by man and why it was important to protect it.