Interview published in Inside Renewable Energy, November 16th, 2006 By Stephen Lacey, Peterborough, New Hampshire. A common criticism of renewable resources such as wind and solar is that they are intermittent - meaning that storage is necessary for times when the resources are not so plentiful. But Dr. Hermann Scheer, General Chairman of the World Council on Renewable Energy, says that the storage problem isn't as big as opponents of renewables make it. Dr. Scheer, who was also Chairman of the first International Renewable Energy Storage Conference held in Gelsenkirchen, Germany last month, tells us about the many techniques and innovations in the field of mass storage.