What are the bubbles that come up a beer?!


Question:

What are the bubbles that come up a beer?


Answers:
Carbonation. Depending on what type of container and/or what brewery. If it is carbonated in the bottle, yeast reacts with sugars to create carbonation. Otherwise, if its kegged or a crappy brewery () then co2 is artificially added like soda water and syrup at McDonalds.
carbonation?
Oxygen?
Co2
carbon dioxide
Carbon dioxide is created during carbonation (that, and alcohol). Some beers are allowed to finish fermenting in the bottle (it's called bottle conditioning). Others have CO2 injected into them before bottling/canning/kegging (it's called forced carbonation).

Despite what someone said earlier, there are many excellent beers out there that are force carbonated.


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