Gauges and pipes marked "Wasserstoff" (hydrogen) are pictured at the "wind2hydrogen" pilot plant on the day it was officially opened in Auersthal, Austria, August 19, 2015. The goal of the research project by Austrian oil and gas group OMV is to set up conditions needed to produce renewable hydrogen to store and transport power from renewable energy, the company says. It produces some 31 kg (68 pounds) of hydrogen per day, the amount sufficient to power a car for some 3,500 km (2,175 miles). REUTERS/Heinz-Peter Bader