Hi friends! So you all are eager to know about the group of solar energy now? Tired of searching what group does it belong to? Never mind! We are here to help you always kiddies.One of the major requirement in the world was, is and will be energy forever and ever.From the evolution of the living organisms, this energy requirement is one of the most important factors for all of us to live our life without any problems. But, it has been many years since revolution and we have passed many centuries across to attain this style of living with advancement in technologies. During the period of ancestors also we required the heat energy or fire energy, and now also we require it. To be more clear, now we require it more because our expectations are high when compared with our forefathers and also the other reason is increase in population.