This book on solar energy applications presents a broad overview on various aspects and applications of this renewable source of energy. It provides evidences of high thermal efficiency of the gravitational draught using concentrated solar heating, new technologies of generating organic fuels using solar heating, new sorts of photovoltaic cells, long term application of thermal solar power plants, the efficiency of thermal storage and solar power utilization in Niger. The readers will find the accompanying illustrations and pictures as a pleasing experience which will ease the text assimilation and make it an attractive source of information.