"basin" . "Amazon river Basin" . "amazon basin" . . "Amazonian" . "basins" . "Amazon" . "Amazon Watershed" . "Basin" . . "Amazon Region" . . "amazon" . . "Amazon River basin" . "Amazon drainage basin" . "Amazonia" . . . "Amazon River system" . "Amazon basin" . "Upper Amazon Basin" . . . . "Amazonian basin" . . . "its drainage basin" . . "Amazon river system" . "Amazon Basin" . "The Amazon" . . "Amazon basin" . . "Amazon region" . . "Amazon River Basin" . "the Amazon" . "Amazonas" . . "Amazon Basin." . "Amazon lowlands" . . . . "Amazonian regions" . . . . . "Amazon jungle" . . "Amazon river basin" .