Want to escape for a while? You''ll be transported to the magnificent beauty and fantastic workings of Antarctica. It's on my "Definitely Re-read List."

I'm not sure about pressurizing with co2, but if it works for you, that's great. Check this out: This is an exerpt from: http://www.cafebelmondo.com/default.aspx?page=pack aging "The best ways to package the coffees are through one-way valve bags. After roasting, coffee releases gas. A one-way valve bag is flushed with nitrogen gas that removes the oxygen from the coffee. As the roasted coffee releases its gas, the gas needs to go somewhere. With a one-way valve bag, the released gases are allowed to leave the bag while air is not allowed to come into the bag."