International flows of energy sources

Although solid fuels still remain a dominant energy source for generating electricity throughout the world (taken as a whole), the overall fuel-energy supply picture has changed dramatically in the last 45 years. In 1925, coal was the overwhelming source of caloric content; today it ranks second to oil. Four decades ago-and until World War II-the United States was a significant net exporter of energy supplies. Today the role of major supplier falls on the Middle East and Africa-and together they provide more than half of the world's fuel energy. Reported are details of the various energy supply sources by type and origin.