How much CO2 does old faithful eject?

Old Faithful, the famous geyser in Yellowstone National Park, emits an estimated 200 to 400 gallons of water per eruption, along with a small amount of carbon dioxide (CO2). While precise measurements can vary, it is generally estimated that an eruption can release around 10 to 20 pounds of CO2. However, the total contribution of Old Faithful to atmospheric CO2 is relatively minimal compared to other natural and man-made sources.