Taco Cowboy writes "Those of you who like free beer, watch out! The practice of fracking for shale gas may ruin the beer you drink. Under the 'Reinheitsgebot,' or German purity law, brewers have to produce beer using only malt, hops, yeast and water. 'The water has to be pure and more than half [of] Germany's brewers have their own wells which are situated outside areas that could be protected under the government's current planned legislation on fracking,' said a Brauer-Bund spokesman. The Brauer-Bund beer association is worried that fracking for shale gas, which involves pumping water and chemicals at high pressure into the ground, could pollute water used for brewing and break a 500-year-old industry rule on water purity."