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Drinking soda pop or other fizzy drinks can make you burp, or belch. That loud sound comes from air or other gases in your stomach. Sometimes when you eat or drink, you swallow air. Since that air gets into your stomach, it has to come out. It comes out as a burp. Carbon dioxide, a gas that makes drinks fizzy, is in soda pop. That’s why drinking soda pop can lead to more gas and more burping.