• AAG – Austrian Airlines Group
• ATK – Available Ton Kilometres are the number of kilometres available for passengers, freight and excess baggage multiplied by the kilometres flown.
• CO – carbon monoxide is produced by the incomplete combustion of fuels and is highly poisonous to humans. It also contributes to the formation of ozone.
• CO₂ – carbon dioxide is the substance most relevant to climate change, as it represents the greatest volume of greenhouse emissions currently being produced. The majority of greenhouse emissions also consist of carbon dioxide. Occurs due to the burning of kerosene and contributes fundamentally to the greenhouse effect due to its long lifespan.
• dB – the decibel is a measure of noise level in the air.
• EPNdB – Equivalent Noise Decibel – a means of representing the noise produced by an aircraft in a form comparable to other sources of noise.
•  Fuel dumping – releasing into the air the fuel volume exceeding the Maximum Landing Weight permitted prior to an unscheduled landing. Takes place in exceptional situations only, and no more than once a year at Austrian Airlines.
• ICAO – International Civil Aviation Association – a special organisation of the UN responsible, amongst other things, for the standardisation and safety in aviation.
•  IATA – International Air Transport Association – organisation devoted to the safe, orderly and economic transportation of people and goods by air.
•  IPCC – the Intergovernmental Panel of Climate Change was founded by UNEP and the World Meteorological Organisation (WMO), and is the leading research centre for climate change and its prevention. 
• Condensation trails – contain the water vapour created during the combustion of fuels. Can remain visible in the sky for long periods, and contribute to the creation of cirrus clouds.
•  LTO – The stage of landing and take-off up to an altitude of 914 m is described as the Landing and Takeoff cycle. Due to the denser atmosphere and the climb/approach flight, different consumption values apply at this stage than during overflight.
• NOx – Nitrous oxides are producing during the combustion of fuels at particularly high temperatures such as those reached in engines. Nitrous dioxide (NO₂) affects the functioning of the lungs in humans, with nitrous oxides also responsible for acidification and overfertilisation of the ground. Depending on altitude, nitrous oxides change the ozone content of the atmosphere.
• PKM – passenger kilometres are the actually allocated number of seats multiplied by the kilometres flown.
• Passengers carried – passengers who travel a specific route, and in so doing also have one or more stopovers (possibly also including a change of aircraft).
• RTK – (Revenue Ton Kilometres) are calculated from the freight capacity in tons multiplied by the kilometres flown.
• Seat kilometres – seat kilometres are calculated from the number of seats multiplied by the number of kilometres flown.
• SO₂ – Sulphur dioxide is produced by the combustion of fuels containing sulphur, and the main cause of acid rain.
• UHC – Unburned Hydrocarbons are produced by the incomplete combustion of fuels and evaporation of fuels. They contribute fundamentally to the formation of ozone and production of smog.

http://verantwortung.lufthansa.com/en.html : Sustainability and environment at Lufthansa

www.enviro.aero : Environmental homepage of the ATAG (Air Transport Action Group) which contains a wide range of informations about flying and the environment.

www.vie-umwelt.at : Aviaton and environment, focussed on Vienna Airport.

www.dialogforum.at : Information about noise management and theconstruction of a 3rd runway in Vienna.