To understand energy, one must realize that it is neither formed nor destroyed. It just moves from place to place as the randomness of the universe increases. Sometimes it gets stored when sunlight is captured by trees that ultimately die and form fossil fuels. Sometimes it is released when those fuels are burned. If an imbalance occurs in the distribution of energy, it becomes a waiting game until it returns or is released from the forms in which it is captured. This composite ICM image depicts its reteurn after a long period of absence during which fossil fuels filled the energy void.