Four ingredients, forty varieties: much to know about beer

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Independent: Bertelsmann Stiftung

Four ingredients, forty varieties: much to know about beer

On April 23, German breweries celebrate that thanks to the purity decree of 1516 their beers can only be brewed from four ingredients. How do so many different varieties and tastes come about anyway? And what is actually the difference between mushroom and wheat beer? An expert knows.