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World Energy Outlook 2007

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Oil and Gas boe barrels of oil equivalent<br />

Power W watt (1 joule per second)<br />

kW kilowatt (1 watt x 10 3 )<br />

MW megawatt (1 watt x 10 6 )<br />

GW gigawatt (1 watt x 10 9 )<br />

TW terawatt (1 watt x 10 12 )<br />

Fuel Definitions<br />

Biodiesel<br />

Biodiesel is a diesel-equivalent, processed fuel made from the transesterification<br />

(a chemical process which removes the glycerine from the oil) of vegetable oils<br />

or animal fats.<br />

Biogas<br />

A mixture of methane and carbon dioxide produced by bacterial degradation<br />

of organic matter and used as a fuel.<br />

Biomass and Waste<br />

Solid biomass, gas and liquids derived from biomass, industrial waste and the<br />

renewable part of municipal waste.<br />

Brown Coal<br />

Includes lignite and sub-bituminous coal where lignite is defined as nonagglomerating<br />

coal with a gross calorific value less than 4 165 kcal/kg and<br />

sub-bituminous coal is defined as non-agglomerating coal with a gross calorific<br />

value between 4 165 kcal/kg and 5 700 kcal/kg. Oil shale and tar sands are also<br />

included in this category.<br />

Clean Coal Technologies<br />

Clean coal technologies (CCTs) are designed to enhance the efficiency and the<br />

environmental acceptability of coal extraction, preparation and use.<br />

Coal<br />

Coal includes both primary coal (including hard coal and lignite) and derived<br />

fuels (including patent fuel, brown-coal briquettes, coke-oven coke, gas coke,<br />

coke-oven gas, blast-furnace gas and oxygen steel furnace gas). Peat is also<br />

included in this category.<br />

634<br />

<strong>World</strong> <strong>Energy</strong> <strong>Outlook</strong> <strong>2007</strong>- ANNEXES

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