The document discusses coal as an energy source used to generate electricity. It introduces Z.V.C Coal, a company founded by Zianne Lopez, Valeria Barboza, and Colleen Carlin who graduated from Harvard with engineering degrees and produce coal energy. Coal is described as a fossil fuel formed from ancient plants and animals, and the process of burning coal to create steam, turn turbines, and generate electricity is outlined. The advantages of coal include being cheap, enabling large electricity production, easy transportation, efficiency, and flexibility in where power stations can be built. A few disadvantages of solar, hydroelectric, wind, wave, and biogas energy are also briefly mentioned.