Many people don’t realize it, but there is a difference between sparkling wine and real champagne. Champagne is only champagne if it comes from a certain area of France and it actually says “Champagne” on the label.
Beside the fact that Champagne is only made in France, there are other strict guidelines to how Champagne is made.
Unlike most wines, champagne goes through a secondary fermentation process which is done in the bottle. That’s what causes natural carbon dioxide gas to get caught inside. This trapped co2 is what causes the bubbles.