Electricity production is responsible for 32% of total global fossil fuel use, accounting for 132 EJ, and 41%, or 10.9 Gt of energy-related CO2 emissions. Improving the efficiency of electricity production therefore offers economic benefits and a significant opportunity for reducing dependence on fossil fuels, which helps to combat climate change and improve energy security.A set of indicators has been developed to analyse the energy efficiency of electricity production from fossil fuels on a global level and for a number of key countries and regions.