ABSTRACT
There are 10 sources of energy and fuel in this world: oil, gas, coal, biomass, waste, nuclear, solar, wind, geothermal, and water. Except for waste all of them are natural sources. Waste can be natural or man-made. Oil, gas, coal, biomass, and waste are raw fuel sources, while solar, wind, nuclear, and geothermal are sources of energy. As indicated in my previous book [1], water can be either fuel or a direct source of energy. Waste is the most heterogeneous source of fuel, which largely contains different types of biomass but can also include glass, metals, polymers, and medical and nuclear waste. It is for this reason that it is classied here as a different source of fuel. It is also the only source of fuel, which heavily depends on the level of the population and the nature of our living style. These 10 sources can also be divided into three categories: (a) fossil (oil, gas, and coal), (b) nuclear, and (c) renewable (biomass, waste, solar, wind, geothermal, and water) energies.
