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 United States is a significant producer of sparkling wine: California in particular is famous for its rosé sparklers. Recently the United Kingdom has started producing Champagne-style wines. Sparkling wine is usually white or rosé but there are many examples of red Australian sparkling Shiraz, some of high quality.
Some wines are made only lightly sparkling, such as vinho verde in Portugal — such wines are often called frizzante or pétillant, or simply semi-sparkling wines. Sparkling Wines as opposed to Semi-Sparkling wines must contain more than 2.5 atmospheres of Carbon Dioxide as at sea level and 20 °C.
