This document discusses various alternative sources of electricity including solar power, wind power, hydroelectric power, nuclear energy, and volcanic energy. It notes that overuse of electricity production can result in no electricity being left for future generations. Solar power in particular is highlighted as an inexhaustible source that uses solar panels to capture sunlight and generators to convert it into electricity. The document concludes by stating that these alternative energy sources can generate energy to save exhaustible resources and non-renewable fuels while being inexhaustible and pollution-free.