Lower Austria, the largest of the country’s nine states and home to 1.65 million people, now receives 100 percent of its electricity from renewable energy sources. The country’s total power output is about 70 percent renewable. The Danube River is so powerful that hydroelectric power is a natural choice. The mountainous geography means that vast amounts of energy can be generated from this high-capacity river rapidly flowing down through a series of steep slopes. The remainder of the state’s energy is sourced from wind, biomass and solar power.