By JOE KLAMAR / AFP As Europe suffered its worst drought in centuries, residents in Austria’s capital were feeling fortunate for their plentiful water supply that courses from streams in the green forests of the Alps. As Europe suffered its worst drought in centuries, residents in Austria’s capital were feeling fortunate for their plentiful water supply that courses from streams in the green forests of the Alps. A rarety in the EU, the two million inhabitants of Vienna get their tap water from dozens of springs — the main one some 655 metres (2,150 feet) above sea level. It’s a serious subjec…