International

Found in many different countries.

Yeasts are living organisms, a uni-cellular fungus, and have a rare ability: to live with or without oxygen. In the presence of air, they multiply. In the absence of oxygen, they ferment sugars into alcohol. That's what makes beer brewing possible.

Water might be the most varied chemical compound on the planet. Plain old H2O is the same anywhere, of course. But brewing with pure water is not only expensive, but leads to poor beer - flat, stale and downright incorrect.