The Earth's resources are being consumed at a rapid rate. If we do not solve this problem, we will all be extinct soon. This book discusses in layman's terms the various areas of research into converting the Sun's energy into ways the energy can be stored and put to practical use. The only inexhaustible supply of energy that we have is energy from the Sun. Green chlorophyll has the ability to convert energy from the Sun into organic compounds that we and other animals eat. This is nature's solution to the problem of capture and storage of energy. Scientists are working to develop photosynthetic processes suitable for commercial development - a complex but not insoluble problem. The author, Farrington Daniels, was a top nuclear scientist at the leadership of the Manhattan Project to develop the A-Bomb. After the conclusion of World War II, he switched over to the study of Solar Power because he recognized that nuclear power has the potential to evaporate the world.