How does evolution of gas from yeast?

The evolution of gas from yeast occurs primarily during the process of fermentation, where yeast, particularly Saccharomyces cerevisiae, metabolizes sugars in anaerobic conditions (absence of oxygen). As yeast breaks down glucose for energy, it produces ethanol and carbon dioxide as byproducts. The carbon dioxide gas is what causes dough to rise in baking and creates bubbles in Alcoholic Beverages. This process is crucial for various food and beverage industries, showcasing yeast's role in fermentation.