APPROXIMATE HEAT CONTENT OF PETROLEUM PRODUCTS

Source. U. S. Department of Energy.

aFuel ethanol, which is derived from agricultural feedstocks (primarily corn), is not a petroleum product but is blended into motor gasoline. Its gross heat content (3.539 million Btu per barrel) is used in Annual Energy Review calculations; its net heat content (3.192 million Btu per barrel) is used in the Energy Information Administration’s Renewable Energy Annual calculations.

14. WORLD COAL RESERVES

Sources. World Energy Council, Survey of Energy Resources 2001, October 2001. United States: Energy Information Administration. Unpublished file data of the Coal Reserves Data Base (February 2002).

Notes. Formerly entitled ‘‘World Estimated Recoverable Reserves of Coal.” The estimates in this table are dependent on the judgment of each reporting country to interpret local economic conditions and its own mineral assessment criteria in terms of specified standards of the World Energy Council. Consequently, the data may not all meet the same standards of reliability and some data, including the Energy Information Administration’s (EIA)’s, may not represent reserves of coal that are known to be recoverable under current economic conditions and regulations. Some data, including the EIA”s, represent estimated recovery rates for highly reliable estimates of coal quantities in the ground that have physical characteristics like those of coals currently being profitably mined. U. S. coal rank approximations are based partly on Btu and may not match precisely borderline geologic ranks. Further, data in this table may represent different base years. Data for the U. S. represent recoverable coal estimates as of December 31, 2000. Data for countries are as of December 31, 1999, the most recent period for which they are available. The Energy Information Administration does not certify the International reserves data but reproduces the information as a matter of convenience for the reader. Sum of components may not equal total due to independent rounding.

aWorld Energy Council definition of ‘‘Proved Recoverable Reserves’’ the tonnage within the Proved Amount in Place that can be recovered (extracted from the earth in raw form) under present and expected local economic conditions with existing available technology.

bData represent both measured and indicated tonnage, as of January 1, 2001 (equated to December 31, 2000). The U. S. term ‘‘measured’’ approximates the term ‘‘proved’’ used by the World Energy Council. The U. S. ‘‘measured and indicated’’ data have been combined prior to depletion adjustments and cannot be recaptured as ‘‘measured alone.’’