a Geothermal, solar, wind, wood, and wastes. bNot applicable.

a Geothermal, solar, wind, wood, and wastes. bNot applicable.

accounting for more than 155 quadrillion Btu, or 38.5% of world primary energy production. Petroleum production in 2001 was 74.7 million barrels per day. The Middle East, as a region, produced about a third of this petroleum (47 quadrillion Btu), followed by North America (28 quadrillion Btu, of which the United States produced nearly 15 quadrillion Btu). Eastern Europe and the States of the FSU produced over 19 quadrillion Btu of petroleum (of which Russia produced 15 quadrillion Btu), with the other regions of the world producing from approximately 14 to 17 quadrillion Btu each.

Coal ranked second as a primary energy source in 2001, accounting for 23.8% of world primary energy production; more than 96 quadrillion Btu of coal (5.3 billion short tons) were produced. As a region, Asia/Oceania was the largest producer, at nearly 46 quadrillion Btu. In this region, China was the largest producer, at 27 quadrillion Btu (1.5 billion short tons), which also made it the largest coal producer in the world. Australia and India ranked a very distant second and third in coal production in this region, at approximately seven and six quadrillion Btu, respectively. This is equivalent to 357 and 339 million short tons, respectively. The second largest quantity of coal produced was on the North American continent—over 25 quadrillion Btu, of which more than 23 quadrillion Btu (or 1.1 billion short tons) were produced by the United States. The United States produced the second largest quantity of coal in 2001, second only to China.

Dry natural gas ranked third as a primary energy source, accounting for 23.2% of world primary energy production in 2001, with over 93 quadrillion Btu (90.7 trillion cubic feet) produced. North America was the largest dry natural gas producer, at about 28 quadrillion Btu, followed closely by eastern Europe and the States of the FSU, where nearly 27 quadrillion Btu were produced. All other regions of the world produced between four and 11 quadrillion Btu in 2001. Russia, the United States, and Canada were the three largest producing countries, at 20.7, 19.8, and 6.7 quadrillion Btu of dry natural gas, respectively. All other countries produced, individually, from less than 5 trillion Btu up to about four quadrillion Btu.

The remaining primary energy sources listed in Table 2-5—hydro-electric, nuclear, and other (geothermal, solar, wind, wood, and waste) electric power generation—ranked fourth, fifth, and sixth, respectively. They accounted for 6.62, 6.56, and 0.8%, respectively, of total primary energy sources in 2001. Combined, they accounted for a total of 56 quadrillion Btu (5.3 trillion kilowatt hours).

The United States produced 2.3 quadrillion Btu of renewable energy that was not used for electricity generation [23]. This included ethanol blended into motor gasoline and geothermal, solar, wood, and waste energy not used for electricity generation. This renewable energy accounted for 0.6% of world primary energy production and ranked seventh as a primary energy source.

Three countries were the leading energy producers in 2001: The United States, Russia, and China together produced 38% of the world's total energy; individually, they produced 71.6, 44.9, and 36.3 quadrillion Btu, respectively. When Saudi Arabia and Canada are included, these five countries produced almost half (i.e., 47.9%) of the world's total energy. The next five leading producers of primary energy were the United Kingdom, Iran, Norway, Australia, and Mexico, which together supplied an additional 12.8% of the world's total energy [23].

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