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Air Liquide
Air Liquide S.A., also known as L'Air Liquide, is a French multinational industrial gas company founded in Paris in 1902, serving about 4.3 million customers in 59 countries.
Air Madagascar
Air Madagascar is the national airline of Madagascar, based at Ivato International Airport in Antananarivo. Founded in 1961, it flew international and domestic routes for six decades.
Air Malta
Air Malta was Malta's national airline, based at Malta International Airport in Luqa, which operated from 1974 until 30 March 2024, when it ceased flying after 50 years and was replaced by KM Malta Airlines.
Air mass
An air mass is a large body of air whose temperature and humidity are horizontally uniform, so it behaves as a single unit; most weather occurs at fronts.
Air Mauritius
Air Mauritius is the national flag carrier of Mauritius, incorporated in 1967 before independence and flying to 13 destinations directly and more than 70 through codeshare agreements.
Air Medal
The Air Medal is a United States military decoration awarded for meritorious achievement or single acts of heroism in aerial flight, established by President Franklin D. Roosevelt in 1942.
Air Medical Group Holdings (AMGH)
Air Medical Group Holdings (AMGH) was a Delaware-incorporated air ambulance company headquartered in Lewisville, Texas, bought by KKR in 2015 and merged with American Medical Response in 2018.
Air medical services
Air medical services, also known as air ambulances, transport patients by helicopter or fixed-wing aircraft for scene response, inter-hospital transfers, and international repatriation, using aircraft equipped as flying intensive care units.
Air Ministry
Air Ministry: British government department created 1 January 1918 to control the air services; administered the Royal Air Force from 1918 until amalgamation into the unified Ministry of Defence on 1 April 1964.
Air motor
An air motor, also called a pneumatic motor, is a machine that converts the energy of compressed air into rotary motion through vanes, pistons, or a turbine.
Aïr Mountains
Aïr Mountains: volcanic and crystalline massif in northern Niger's Agadez region, southeastern Tuareg shield, rising to about 2,000 m; Sahelian ecological island in the Ténéré desert, home to addax and dama gazelle, World Heritage since 1991.
Air National Guard
Air National Guard (ANG): dual federal-state reserve component of the U.S. Air Force, established 18 September 1947; 106,300 authorized end strength, 54 state and territorial organizations, governor command in peacetime.
Air navigation
Air navigation, also called aerial navigation, is how an aircraft determines its position and flies a safe course, from pilotage and dead reckoning to satellite navigation.
Air New Zealand
Air New Zealand, also known as Air NZ, is the flag carrier of New Zealand, flying more than 400 flights a day to 49 domestic and international destinations.
Air New Zealand fleet
The Air New Zealand fleet is the operating aircraft fleet of New Zealand's flag carrier, comprising 115 aircraft as of 2026, from Q300 turboprops to Boeing 777-300ER wide-bodies.
Air observer
An air observer was a non-pilot military aircrew member responsible in flight for navigation, gunnery, photography, wireless communication, and bomb aiming, a role dating to the First World War.
Air on the G String
Air on the G String, or Air auf der G-Saite, is August Wilhelmj's 1871 arrangement of the Air from Bach's Orchestral Suite No. 3 in D major, BWV 1068, transposed to C major so the melody plays on the violin's G string.
Air operator's certificate
An air operator's certificate (AOC), known in the United States as an air carrier certificate, authorizes an operator to perform specified commercial air transport operations with specified aircraft.
Air Park
Air park (airpark) covers several aviation-related place types: airport-adjacent industrial parks (Wilmington, Goodyear, Westmoreland), static aircraft display parks (Maxwell AFB, 1983), the historic London Air Park at Hanworth, and residential airparks.
Air Passengers Rights Regulation
The Air Passengers Rights Regulation, often called the Flight Compensation Regulation, is an EU law requiring airlines to compensate and assist passengers for delays and cancellations.
Air Peace
Air Peace Limited is a privately owned Nigerian airline founded in 2013 by Allen Onyema, with headquarters in Lagos. It is Nigeria's largest airline by fleet size and route network.
Air Planes
Air Planes (الطائرات) is a small theme park in Tiaret Province, Algeria, at 35.38597° N, 1.30789° E, near Bumper cars, game 12, and a Ferris wheel; OSM way 953023847.
Air pollution
Air pollution is the contamination of indoor or outdoor air by chemical, physical, or biological agents from vehicles, industry, and fires, causing about 7 million premature deaths annually, mostly in low- and middle-income countries.
Air pollution in Delhi
Air pollution in Delhi, often called Delhi smog, is chronic PM2.5 pollution driven by vehicles, dust, crop burning, and industry, worst in winter, with residents losing an estimated 8.2 years of life expectancy.
Air pollution in India
Air pollution in India: ambient and household air contamination, the country's leading death risk factor with over 2 million deaths in 2023, PM2.5 exposure of 54.1 µg/m³, and the National Clean Air Programme launched in 2019.
Air Pollution Index
The Air Pollution Index, commonly called the Air Quality Index (AQI), is a numerical scale that converts pollutant concentrations into an easily understood number or color band.
Air preheater
An air preheater is a heat-recovery device that transfers heat from a boiler's outgoing flue gas to incoming combustion air, raising efficiency and reducing fuel use. The two main types are recuperative and regenerative.
AIR PRESSURE trial
AIR PRESSURE trial (NCT04908917), Reducing AIR Pollution Exposure to Lower Blood PRESSURE: Wayne State University randomized double-blind sham-controlled trial of 200 Detroit adults with mild hypertension, testing 21 days of bedroom HEPA portable air cleaner use versus sham for lowering home blood pressure.
Air Products
Air Products and Chemicals is an American industrial gases company founded in 1940 by Leonard Parker Pool, headquartered in Pennsylvania's Lehigh Valley and operating in about 50 countries.
Air Products & Chemicals
Air Products & Chemicals is an American industrial gases company founded in 1940, one of the four global industrial gas majors, selling gases in about 50 countries.