97 Fermentation has been used by mankind for thousands of years for raising bread, fermenting wine and brewing beer.
Carbon dioxide causes bread to rise and gives effervescent drinks their bubbles.
We will set up a fermentation in a closed system and capture the generated carbon dioxide to carbonate root beer. Zatarains's Root Beer Extract measuring cups powdered baker's yeast measuring spoons cold fresh water Rinse out a 2 liter plastic soft drink bottle well. Swirl to dissolve the ingredients. Invert repeatedly to thoroughly dissolve. Store in cool place.