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Brewing is the process of making beer. It is usually made in a brewery, though it can be made at home.[1] It is made by adding bacteria that ferment malt, barley or sugar into a large vat. Ethanol is produced by bacteria using up the energy from the mixture (which the bacteria digest into glucose) because there is no oxygen in the vat.

References[change | change source]

  1. "Brewing - Google Books". Retrieved 2011-01-21.