In Chapter 3, we surveyed the main issues in modern western energy policy, especially as they shape choices concerning electricity generation and supply. Figure II.4.1 illustrates in absolute terms the amounts of primary energy supplied by nuclear fission around the world. The data are presented in TWh but do not refer to the amount of electricity supplied to end users, but rather indicate the amount of fuel energy that would be required to provide the electricity. The scaling applied is the same for each country. The largest amounts of nuclear power are generated by the United States, France, Russia, and China. For example, the United States generated 809.4 GWh of nuclear electricity in 2019 (see Table II.4.1).