The point I was trying to make is that even if you buy CO2 you are not adding any CO2 to the atmosphere since that CO2 has either been taken out of the atmosphere or is the byproduct of some other process (e.g. combustion) which was not allowed to go into the atmosphere yet. As I see it reclaiming CO2 in a brewery has only an economical benefit, but there is nothing wrong with that.
Kai, have you been watching the history channel, I love watching scientist prove and disprove each other.... global warming.
They just did a show on N.America's Ice Age, it was quite interesting.
A friend of mine was also talking about how some people still want to tax farmers for cattle farts being a major contributor to global warming also... I guess dinosaurs and whatnot didn't fart, they were ladies.
Maybe a change in the topic, I don't know but has anyone tried brewing with snow? The same friend I was talking about mentioned to me that snow has nitrogen in it... I suppose it would probably escape during the boil though? I was thinking yeast need the FAN.