What is the difference between Art Nouveau and Art Deco?

The main difference between Art Nouveau and Art Deco is that the former is detailed and ornate, and the latter is sharp and geometrical. When the movement started at the end of the 19th century, Art Nouveau was heavily influenced by nature and the curved lines of flowers. Art Deco, which became popular in the beginning of the 20th century, was inspired by the geometric abstraction of cubism.