Discussing energy it means also talking about human civilization. It has known the energy history always linear with the civilization that was created by the human. In the olden times, when our ancestors were living with the nomad era, biomass, or the energy that came from the tree, such as wood, is the only choice used. Wood was used for producing fire and light. By this fire, the required energy for living and safety factors, preventing the wild animal, was sufficient. Moving to the agriculture revolution era when humans were permanently lived in some areas and developed farming-field for their food consumption, wood is not only the one source of energy for humans. Wind energy, waterfall (hydropower), and the animals' power started to be used for helping daily activities. Plowing up the land and crushing the rice seed are examples of human activities in this era. Moreover, horse and donkey were used as a transportation medium. The era when wood became the primary source of ener...