This document discusses different methods of power generation including thermal, nuclear, and hydroelectric power. For thermal power generation, fuel is burned to create heat energy which boils water and spins a turbine that generates electricity. Nuclear power uses uranium fuel rods to create heat from nuclear fission that also spins a turbine. Hydroelectric power harnesses the kinetic energy of moving water using dams and turbines. The document outlines some problems with each method such as air pollution, radioactive waste, and environmental impacts, and discusses ways to address the issues.