This document discusses different ways of generating electricity including fossil fuels like coal and gas, nuclear fuel, and renewable sources like solar, wind, and tidal power. It outlines some key advantages and disadvantages of each energy source. It also explains how power stations use primary energy sources to boil water and create steam to drive turbines that generate electricity. The efficiency of this process can be illustrated using a Sankey diagram that shows how much of the original fuel's energy is lost versus how much is converted to electricity.