You know that aussie imported some sort of plant to try to stop desertification reality is that the plant dries up, transform in gigantic balls of dry flammable material and create HUGE fires Also, they imported rabbits, and they have rabbit infested places Also, they imported venomous frog, to take care of alligators, you guess what is happening... Also, they imported carp (a fish) and now the river has just carps (they are predators) I heard thay wanted to import elephants to take care of the grass..... but thay did not do it, yet....