S. Fred Singer, professor emeritus at the University of Virginia and director of the Science and Environmental Policy Project. Gerald E. Marsh, a retired physicist from Argonne National Laboratory - Many people believe that wind and solar energy are essential for replacing nonrenewable fossil fuels. They also believe that wind and solar are unique in providing energy that’s carbon-free and inexhaustible. A closer look shows that such beliefs are based on illusions and wishful thinking.