COPENHAGEN, Denmark, Aug. 1 (UPI) -- Possibly the purest beer in the world has gone on sale in Denmark from a Greenland microbrewery that uses 2,000-year-old water from a melting polar ice cap. The three-employee Greenland Brewhouse began offering samples at a Greenland festival in Copenhagen Monday where the first 17,200 gallons were shipped from the southern Greenland town of Narsaq, 390 miles south of the Arctic Circle, The Scotsman reported. "Today, with all the pollution ... you cannot get cleaner water than melted ice-cap water," said Salik Hard, one of the three partners in the venture. His partners are...