I know basically nothing about biology/fermentation, but from the tiny bit I do know by having made yogurt and alcohol, and out of curiosity: does this use bacteria, yeast, or some other beast that I don't know about?
Is there a possible future where these critters could eventually turn a clean CO2 source into recreationally drinkable fluid?
And yes they could convert CO2 into recreational drinking fluid, and I learned from someone else in this thread that it would be totally legal!