Scottish Ales originated in Scotland and are generally clean and malty with perhaps a faint touch of smoke and few fruity esters. Most examples have a low hop profile due to the historical fact that hops are not grown in Scotland and expensive imported hops were, therefore, used sparingly. Some examples also have a peaty character which is typically perceived as earthy, smoky or very lightly roasted. Typically this ale is clear, deep amber or dark copper in appearance, although the stronger versions can be dark brown in color. Scottish Ales are divided into sub-styles differentiated on alcoholic strength ranging from a low of 2.5% alcohol by volume (abv) to around 10% alcohol by volume (abv).