Sparkling wines can be made from almost any grape varietal. These wines contain carbon dioxide bubbles. Carbon dioxide occurs naturally during fermentation. Winemakers around the world have developed special techniques to trap carbon dioxide in the wine. Sparkling wines are often incorrectly referred to as Champagne – Champagne is a type of sparkling wine, but there is a distinct difference between the two. Champagne is named after a region in northeast France. By law, wines can only be called Champagne when they are made solely from grapes grown in the Champagne region and produced according to strict guidelines.