Sparkling wine is a wine with 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 méthode champenoise, or in a large tank designed to withstand the pressures involved, as in the Charmat process) or as a result of carbon dioxide injection.
The most famous type of sparkling wine, Champagne, hails from the Champagne region of France and conforms to the appellation standard. Its Italian counterpart, spumante is produced by the Charmat-Martinotti method. America is also a large scale producer of sparkling wine.