The intentional oxidation of materials within an apparatus that is designed to provide heat or mechanical work to a process, or for use away from the apparatus.
(IPCC 2006, "Guidelines for National Greenhouse Gas Inventories", Volume 2: Energy)
As far as aviation is concerned, carbon dioxide (CO2) is emitted during the combustion of aviation fuel (kerosene) in direct proportion to the kerosene consumed: 3.16 kilograms CO2 are produced per kilogram of kerosene burned.
(IPCC 1999, "Aviation and the Global Atmosphere", IPCC Special Report)
See also: Aircraft emissions
=> Glossary