Germany has set an ambitious goal: to run its economy almost entirely on renewable energy by 2050. The energy push, known as the Energiewende, or energy transformation, is often compared in scope to the country's postwar reconstruction. It will require wide-ranging changes in German society - not just in energy supply but in architecture and agriculture, urban planning, and economic markets. Treading onto this unknown territory, Germany has called on its universities to help make the transformation work. While Germany is supporting university research into solar power and other clean energy, perhaps the biggest innovation in higher education is how the Energiewende has triggered the creation of new interdisciplinary approaches, pushing institutions to develop new courses, degrees and departments. Green technology is not necessarily where the breakthroughs need to happen, said Karl-Friedrich Ziegahn, head of the renewable energy department at the Karlsruhe Institute of Technology's School of Energy. In terms of the transformation, Germany's biggest challenges today, he said, are socioeconomic in nature: public awareness, cost and community involvement." Germany has already made enormous strides in clean energy generation. In roughly a decade, it has expanded its green power supply to account for a quarter of its electricity - which is twice the United States' share of renewables. On especially sunny and windy days, when wind farms and solar parks churn out power at peak volume, more than two-thirds of the country's electricity needs are covered by renewables.