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56
votes
8answers
13k views

Why did people start using CO2 (instead of e.g. oxygen) for carbonated drinks?

I am curious about why those who invented carbonated drinks chose to use specifically carbon dioxide in the liquid, instead of some other gas (say, oxygen). (Obviously they wouldn't necessarily have ...
11
votes
4answers
10k views

Is there such a thing as “food grade CO2”?

I'm thinking about building a setup to make my own carbonated water. Should I be concerned that I'll be filling up my CO2 tank at Dick's Sporting Goods?