The United States is a significant producer of sparkling wine with producers in numerous states. The classic example of a sparkling wine is Champagne which is exclusively produced in the Champagne region of France. Sparkling wine has significant levels of carbon dioxide in it, making it fizzy. The carbon dioxide may result from natural fermentation, either in a bottle (as with the traditional method), in a large tank designed to withstand the pressures involved, or as a result of carbon dioxide injection. Sparkling wine is usually white or rosé but there are many examples of red sparkling wines such as Italian Brachetto. The sweetness of sparkling wine can range from very dry "brut" to sweeter "extra dry". Most countries reserve the word Champagne for a specific type from the Champagne region of France.