The northernmost AC of France, Champagne is famous for its sparkling wines. The Champagne process ensures the fizz in every bottle by allowing added yeast to dissolve added sugar and produce carbon dioxide gas. The region's chalky, poor soil produces acidic, thin wines that would not be suitable for drinking without this additional spark. The region of Champagne includes around 300 wine producing villages with 17 being producers of the best quality sparkling wines. Known as the Grand Crux vineyards, these top producers include the Bouzy, Aÿ, Sillery and Le Mesnil. Most Champagne is a blend of Chardonnay, Pinot Noir, and Pinot meaunier grapes while some pure bottles do exits. Champagne comes in styles ranging from the highly exceptional brut, which is extremely dry and full, to the sweet, desert doux , with extra dry and sec styles in between. Champagne also comes in a range of production styles. These include the blended non-vintage Champagnes which are meant for immediate consumption and the vintage Champagnes that are made from a single vintage of the best grapes. Other styles include the Blanc de Blancs, made only from Chardonnay, the Blanc de Noirs, made from the two Pinots, the Rose, and the expensive and high quality De-luxe Cuvees.