The future energy needs have to be met essentially by properly harnessing solar radiation. As this area of research centers on the generation of hydrogen from water and also on the reduction of carbon dioxide and di-nitrogen to value added chemicals. Some of these aspects have been covered in this presentation. It is to be noted that forty years of research has not yielded the desired results and the clues for the causes for this failure is considered in this presentation. From many respects that this exercise is considered to be unique and the contents of this book can be comprehended by general readers interested in the general topic of Energy.