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Carbonation in beverages happens by two major means. Champagne, Cava and other beverages using the name Champagne, such as Soviet Champagne and California Champagne undergo two fermentations. In the first fermentation in a vat the yeast present in the grape juice creates alcohol but the resulting CO2 byproduct is allowed to disperse into the air. Then the beverage is bottled and tightly corked and a second fermentation (Bottle fermentation) creates more CO2 that is now trapped in the bottle. [Read More]