This page covers the formation, types, and ecological importance of sand dunes, which act as habitats and protect coastlines. It details various dune classifications shaped by wind patterns and discus...This page covers the formation, types, and ecological importance of sand dunes, which act as habitats and protect coastlines. It details various dune classifications shaped by wind patterns and discusses the impact on human settlements, notably desertification. The page provides a global overview of notable dune locations and includes references to studies on dune management and fixation.