A solution to the climate and energy crisis The reversible fuel cell (RFC) described in this volume stores solar energy and thereby makes it continuously available. This can make the building of energy-free homes and all electric transportation a reality. The foldout drawing at the back of this book also describes the detailed design of the world’s first 1,000 megawatt solar-hydrogen power plant. How is this possible? Our planet receives more solar energy in an hour than humans use in a year. In fact, 5% of the Sahara could meet the total energy requirement of mankind. This energy can then be stored and transported in the form of hydrogen.