The document discusses the environmental impact of invasive species in the Florida Everglades. It notes that many invasive species, such as tegu lizards and pythons, threaten native species by eating their eggs or preying on them. Invasive species can also introduce new diseases to native species. The document argues that humans are responsible for introducing many invasive species by releasing exotic pets or through illegal breeding operations. It states that government agencies are now working to control invasive species populations through hunting and bans on releasing exotic pets.