The world is at the crossroads of either quickly changing the energy picture towards implementing efficient renewable energy sources or postponing this process by another generation. Based on the author's more than 30 years industrial experience, this book gives a set of assumptions by extrapolating known technology developments and shows that 100% coverage by renewable technology of the global energy needs is much more probable than previously argued.

Winfried Hoffmann obtained his PhD in biophysics in 1977. From 1997 until 2014 he was a member of the Board of EPIA (European PV Industry Association) and President for more than eight years. He is a member of the Scientific Board of the Fraunhofer Institute for Solar Energy and the NEXT Institute in Oldenburg, as well as a member of the Supervisory Board of the Institute for Solar Energy Research in Hameln and the Helmholtz Centre Berlin. He acts as Chairman of the Supervisory Board of Solarfabrik AG and is a member of the Supervisory Board of SMA Solar Technology AG. In 2012 he received the "European Becquerel Prize for Outstanding Merits in PV" from the European Commission.