Air pollution Earth's atmosphere pollution is a broad term applied to any chemical, physics , or biological agent that modifies the natural characteristics of the Earth's atmosphere. The atmosphere is a complex, dynamic natural system that is essential to support life on planet earth.
	Air Wave Air Wave is the name of three fictional super-hero in the DC Comics DC Universe. The first two were active in the Golden Age of Comic Books; the current Air Wave is a modern super-hero.
	Air-raid shelter Air raid shelters are structures for the protection of the civil population as well as military personnel against enemy attacks from the air.
	Air-to-air missile An air-to-air missile is a guided missile fired from an aircraft for the purpose of destroying another aircraft. It is typically powered by one or more rocket motors, usually solid fuelled but sometimes liquid fueled. Ramjet engines, as used on the MBDA Meteor, are emerging as propulsion that will enable future medium-range missles to maintain higher average speed across their engagement envelope.
	Air-to-surface missile An air-to-surface missile is a missile designed to be launched from military aircraft and strike ground targets on land, at sea, or both. They are similar to guided glide bombs but to be considered a missile, they usually contain some form of propulsion system. The two most common propulsion systems for air-to-surface missiles are rocket motors and jet engines.
	Airbrush An airbrush is a small, air-operated tool that sprays various media including ink and dye, but most often paint by a process of atomization. Spray guns developed from the airbrush and is still considered a type of airbrush. The first airbrush was invented in 1879 by Abner Peeler, in Iowa, United States.
	Airbus Airbus Socit par actions simplifie is a leading aircraft manufacturer based in Toulouse, France.
	Aircraft An aircraft is any machine capable of Earth's atmosphere flight.
	Aircraft carrier Additive synthesis is a technique of audio synthesis which creates musical timbre. The timbre of an instrument is composed of multiple harmonics or partials, in different quantities, that change over time. Additive synthesis emulates such timbres by combining numerous waveforms pitched to different harmonics, with a different amplitude envelope on each, along with inharmonic artifacts.
	Airdrop An airdrop is a type of airlift, developed during World War II to resupply otherwise inaccessible soldier, who themselves may have been airborne forces. In some cases, it is used to refer to the airborne assault itself. Early airdrops were conducted by pushing small crates with parachutes out of the aircraft's side cargo doors.
	Airedale Terrier image = Rambo.jpg | image_caption = An Australian & New Zealand Champion | name = Airedale Terrier | country = United Kingdom | altname = Waterside TerrierBingley TerrierKing of the Terriers | nickname = Airedale, 'Dale | fcigroup = 3 | fcisection = 1 | fcinum = 7 | fcistd = akcgroup = Terrier Group
	Airfoil An airfoil is the shape of a wing or blade as seen in cross-section. It is passed through a fluid in order to provide either lift or downforce, depending on its application. Subsonic-flight airfoils have a characteristic shape with a rounded leading edge, followed by a sharp trailing edge, and often with Camber.
	Airheads Airheads is a comedy film released on August 5, 1994. It was written by Rich Wilkes and directed by Michael Lehmann. It stars Brendan Fraser, Adam Sandler, and Steve Buscemi as a group of loser musicians called The Lone Rangers who take a radio station hostage, just so that their song would get some airplay.
	Airline An airline provides civil aviation for passengers or freight. Airlines leasing or own their airliner with which to supply these services and may form partnerships or Airline alliance with other airlines for reasons of mutual benefit.
	Airliner An airliner is a large fixed-wing aircraft whose primary function is the transportation of paying passengers. Such aircraft are usually operated by an airline which owns or leasing the aircraft. The official definition of an airliner varies from country to country, but the common definition is an aircraft with seating for 20 or more passengers and/or an empty weight above 22,680 kg , with two or more engines.
	Airmail Airmail is mail that is transported by aircraft. It typically arrives more quickly than surface mail, and usually costs more to send. Airmail may be the only option for sending mail to some destinations, such as overseas, if the mail cannot wait the time it would take to arrive by ship, sometimes weeks.
	Airman Airman is a term used to refer to any enlisted personnel in the United States Air Force or Other Ranks in the Royal Air Force. It is also a specific United States Air Force rank and United States Navy rate. More informally, it can refer to any member of an air force or to any aviator, military or civilian.
	Airport An airport is a facility where aircraft such as airplanes and helicopters can take off and landing. An airport minimally consists of one runway or helipad , but other common components are hangars and airport terminal buildings. Additionally, an airport may have a variety of facilities and infrastructure, including fixed base operator, air traffic control, passenger facilities such as restaurants and lounges, and emergency services.
	AirPort AirPort is a wireless LAN system from Apple Computer based on the IEEE 802.11b standard and certified as compatible with other 802.11b devices. A later family of products based on the IEEE 802.11g specification is known as AirPort Extreme, offering speeds up to 54 megabits per second and interoperability with older products.
	Airport terminal An airport terminal is a building at an airport where passengers transfer between ground transportation and the facilities that allow them to board and disembark from airplanes. Passengers taking a flight will typically take an automobile, taxicab, bus, or train to the airport and then enter the terminal.
	Airship An airship is a buoyancy aircraft that can be steered and propelled through the air. Unlike aerodynamic craft which stay aloft by moving an airfoil through the air in order to produce lift , aerostatic craft such as airships stay aloft primarily by means of a cavity filled with a gas of lesser density than the surrounding atmosphere.
	Airstream Airstream is a brand of recreational vehicle presently manufactured in Jackson Center, Ohio. The company, which employs about 400, is owned by Thor Industries. Colonial Airstream, based out of New Jersey, is their top volume dealership. Airstream trailers are well recognized for their distinctive rounded aluminum bodies, which originated in the 1930s from designs originally created by Hawley Bowlus of aviation fame and others.
	Aisle An aisle is, in general, a space for walking with rows of seats on either side or with rows of seats on one side and a wall on the other. Aisles can be seen in certain types of buildings such as churches, synagogues, meeting halls, parliaments and legislatures, courtrooms, theatres, and in certain types of passenger vehicles.
	Aizoaceae The Family Aizoaceae is a taxon of dicotyledonous flowering plants containing some 126 genera and between 1100-2000 species. They are commonly known as stone plants or carpet weeds. The family is widely recognised by taxonomists, although once it went by the botanical name "Ficoideae", now disallowed.
	Akha The Akha are an ethnic group which originated in China and Tibet. Most of the remaining Akha people are now distributed in small villages among the mountains of China, Laos, Myanmar, and northern Thailand, where they are one of the six main hill tribes. Some 80,000 live in Thailand's Northern Thailand of Chiang Rai and Chiang Mai at high altitudes.
	Akhenaten Akhenaten, known as Amenhotep IV at the start of his reign, was a Pharaoh of the Eighteenth dynasty of Egypt. He was born to Amenhotep III and his Chief Queen Tiye and was his father's younger son. Akhenaten was not originally designated as the successor to the throne until the untimely death of his older brother, Crown Prince Tuthmose.
	Akira Kurosawa Akira Kurosawa was a prominent Japanese film director, film producer, and screenwriter. Few filmmakers have had a career so long or so acclaimed as Akira Kurosawa, perhaps Japan's best-known filmmaker. His films greatly influenced an entire generation of filmmakers the world over, ranging from George Lucas to Sergio Leone.
	Akvavit Akvavit, also known as aquavit or akevitt, is a Scandinavian distilled beverage of typically about 40% alcohol by volume. Its name comes from aqua vitae, the Latin for "water of life".
	AL AL or Al may refer to: *Accursed Lands *AL *Almanor Railroad *The American League in Major League Baseball *Anno Lucis, a Masonic calendar system *Arab League *Asia League Ice Hockey *Skyway Airlines IATA airline code *Transaviaexport Cargo Airline IATA airline code
	Al Capone Alphonse Gabriel Capone , popularly known as Al "Scarface" Capone, was an infamous Italian-American gangster in the 1920s and 1930s, although his business card reportedly described him as a used furniture dealer. A Naples born in New York City to Gabriele and Teresina Capone, he began his career in Brooklyn before moving to Chicago and becoming Chicago's most notorious crime figure.
	Al Gore Albert Arnold Gore, Jr., is an United States politician, teacher, businessman, and Environmentalism who served as the 45th Vice President of the United States in the Clinton administration from 1993 to 2001. Previously, he had served as a United States House of Representatives and United States Senate from Tennessee.
	Al Hirschfeld Albert Hirschfeld was an American caricaturist, best known for his simple black and white satirical portraits of celebrities and Broadway theatre stars. Born in St. Louis, Missouri, he moved with his family to New York City, where he received his art training. In 1924 he traveled to Paris and London, where he studied painting, drawing and sculpture.
	Al Jolson Asa "Al Jolson" Yoelson was an acclaimed United States singer and actor whose career lasted from 1911 until his death in 1950. He was one of the most popular entertainers of the 20th century whose influence extended to other popular performers, including Bing Crosby and Eddie Fisher.
	Al Madinah Al Madinah is a provinces of Saudi Arabia of Saudi Arabia, located on the country's west side, along the Red Sea coast. It has an area of 173,000 km and a population of 1,310,400. Its capital is the sacred city of Medina. Other towns include Yanbu' al Bahr and Badr Hunayn.
	Al-Qaeda Al-Qaeda or Al-Qaida is an armed Sunni Islam Islamism organization with the stated objective of eliminating foreign influence in Muslim countries. The most prominent members of the group are adherents of Wahabism, an extreme, militant sect of Islam. While Osama bin Laden is generally recognized as the group's leader, it is theorized that the group's operations are not centralized, and many independent and collaborative cells may exist in multiple countries linked by a common cause.
	Alabama Alabama is a U.S. state located in the Southern United States United States.
	Alabama River The Alabama River, in the United States state of Alabama, is formed by the Tallapoosa River and Coosa River rivers, which unite about six miles above Montgomery, Alabama. It flows west as far as Selma, Alabama, then southwest until,
	Alabaster Alabaster is a name applied to varieties of two distinct minerals: gypsum and the calcite . The former is the alabaster of the present day; the latter is generally the alabaster of the ancients. The two kinds are readily distinguished from each other by their relative hardnesses.
	Aladdin Aladdin is one of the tales with a Syrian origin in The Book of One Thousand and One Nights, and one of the most famous in Western culture.
	Álamos The town of lamos in the States of Mexico of Sonora, Mexico, was founded in the late 17th century following discoveries of copper mines in the region. It was named by the conquistador Francisco Vsquez de Coronado, and became the capital of the surrounding region.
	Alan Seeger Alan Seeger was an United States of America poet. Born in New York, Seeger moved with his family to Staten Island at the age of one and remained there until the age of ten. In 1900, his family moved to Mexico for two years, which influenced the imagery of some of his poetry.
	Alan Shepard Alan Bartlett Shepard, Jr. was the first United States astronaut in space.
	Alan Turing Alan Mathison Turing, Order of the British Empire , was an England mathematician, logician, and cryptographer. Turing is often considered to be the father of modern computer science. With the Turing test, Turing made a significant and characteristically provocative contribution to the debate regarding artificial intelligence: whether it will ever be possible to say that a machine is consciousness and can thought.
	Alanine Alanine also 2-aminopropanoic acid is a non-essential a-amino acid. It exists as two distinct enantiomers - L-alanine and D-alanine. L-alanine is one of the 20 amino acids most widely used in protein biosynthesis, second to leucine, accounting for 7.8% of the primary structure in a sample of 1,150 proteins .
	ALARM ALARM is a United Kingdom anti-radiation missile designed primarily to destroy enemy radars for the purpose of SEAD. It is similar in this role to the American AGM-88 HARM missile but not in its method of operation.
	Alarm clock An alarm clock is a clock that is designed to make an alarm sound at a specific time. The primary use of these clocks is to awaken people from their sleep in order to start their days in the mornings, but they are sometimes used for other reminders as well. To stop the sound, a button or handle on the clock needs to be pressed, and some stop automatically after a few minutes if left unattended.
	Alarum Alarum are a 4 piece tech metal fusion-metal, or jazz metal band from Melbourne, Australia. They are stylisically quite similar to early-90's pioneers Cynic_(band).
	Alaska Alaska is a U.S. state, located on the West Coast of the United States of North America. It is by far the largest state in List of U.S. states by area, but one of the List of U.S. states by population. It is the 49th state, having been admitted to the Union on January 3, 1959.
	Alaska Peninsula The Alaska Peninsula is a peninsula extending about 800 km to the southwest from the mainland of Alaska and ending in the Aleutian Islands. Along with the Aleutians, is serves to separate the Pacific Ocean from Bristol Bay, an arm of the Bering Sea.
	Alaska Range The Alaska Range is a 650-km-long mountain range in the Southcentral Alaska of the U.S. state of Alaska, from Iliamna Lake at its southwest end to White River in Canada in the southeast. The highest mountain in North America, Mount McKinley, is in the Alaska Range.
	Alaskan Malamute image = Alaskan Malamute 600.jpg | image_caption = An Alaskan Malamute | name = Alaskan Malamute | country = United States | nickname = Mal | fcigroup = 5 | fcisection = 1 | fcinum = 243 | fcistd = akcgroup = Working | akcstd = ankcgroup = Group 6 - | ankcstd = ckcgroup = Group 3 - | ckcstd = kcukgroup = Working
	Alauda Alauda is a genus of larks with three widespread species found across much of Europe, Asia and in the mountains of north Africa, and one endemic to the island of Razo in the Cape Verde Islands. These are 14-18 cm long birds of cultivation, heath, natural steppe and other open habitats.
	Alb The alb, one of the liturgy vestments of the Roman Catholic, Anglican and many Protestant churches, is an ample garment of white linen coming down to the ankles and usually girded with a cincture. It is simply the long linen tunic used by the ancient Rome of old.
	Albacore The albacore is an important food fish, a type of tuna. It is found in the open waters of all tropical and temperate oceans, and the Mediterranean Sea. The pectoral fins of the albacore are very long, as much as 30% of the total length. The dorsal spines are 11-14 in number, and well forward of the rays of the dorsal fin.
	Albania The Republic of Albania is a Balkan country in Southeastern Europe. It borders Montenegro to the north, the southern Serbian province of Kosovo in the northeast, the Republic of Macedonia in the east, and Greece in the south. It has a coast on the Adriatic Sea to the west and a coast on the Ionian Sea to the southwest.
	Albanians The Albanians are an ethnic group generally associated with Albania, Kosovo including the Preevo Valley, the Republic of Macedonia, Montenegro, and also the Albanian language. About half of today's Albanians live in the Albania, with the second largest group living in the United Nations Interim Administration Mission in Kosovo of Kosovo , also central Serbia, Montenegro and the Republic of Macedonia.
	Albatross Albatrosses, of the biological family Diomedeidae, are large seabirds allied to the procellariidae, storm-petrels and diving-petrels in the order Procellariiformes. They range widely in the Southern Ocean and the North Pacific Ocean.
	Albedo Albedo is a ratio of scattered to incident electromagnetic radiation power, most commonly light. It is a Dimensionless number measure of a surface or body's reflectivity. The word is derived from albus, a Latin word for "white". The albedo is an important concept particularly in climatology and astronomy.
	Albert Abraham Michelson Albert Abraham Michelson was a Poland-born German-USA physicist known for his work on the measurement of the speed of light and especially for the Michelson-Morley experiment. In 1907 he received the Nobel Prize in Physics, the first American to receive the Nobel in the sciences.
	Albert Camus Albert Camus was a France author and philosopher. Though often associated with the school of existentialism, Camus preferred to be known as a man and a thinker, rather than as a member of a school or ideology; he preferred persons over ideas. In an interview in 1945, Camus rejected any ideological associations: "No, I am not an existentialist.
	Albert Einstein Albert Einstein was a Germany-born theoretical physics. He is widely regarded as the most important scientist of the 20th century and one of the greatest physicists of all time. He played a leading role in formulating the theory of relativity; moreover, he made significant contributions to quantum mechanics and statistical mechanics.
	Albert Sabin Albert Bruce Sabin is a renowned United States medical researcher who is best-known for having developed the hugely successful oral vaccine for Polio. Born in 1906 in Bialystok, Russia, he emigrated in 1921 to America with his family. In 1930, he became a naturalized citizen of the United States.
	Albert Schweitzer Albert Schweitzer, M.D., Order of Merit, was a Germany Alsace theology, musician, philosopher, and physician. He was born in Kaysersberg, Alsace-Lorraine, Germany . He received the 1952 Nobel Peace Prize in 1953 for founding the Lambarn Hospital in Gabon, west central Africa.
	Albert Speer Albert Speer was a Nazi Germany high government official, architect, and author. He is sometimes called "the first architect of the Third Reich". He was Hitler chief architect in Nazi Germany and in 1942 became Hitler's minister for armaments and had considerable success reforming and streamlining Germany's war production.
	Alberta Alberta is one of Canada's Provinces of Canada. It became a province on September 1, 1905. Alberta is located in western Canada. It is bounded by the provinces of British Columbia on the west and Saskatchewan on the east, Northwest Territories on the north, and by the United States U.S. state of Montana on the south.
	Alberto Giacometti Alberto Giacometti was a Swiss Sculpture, painter, drawing and printmaking.
	Albinism Albinism is a lack of pigment, biology in the eyes, skin and hair. Albinism is an inherited condition resulting from the combination of recessive alleles passed from both parents of an individual. This condition is known to affect mammals, fish, birds, reptiles, and amphibians.
	Albion Albion , is the most ancient name of Great Britain, though sometimes used to refer specifically to England. Occasionally it instead refers to only Scotland, whose name in Scottish Gaelic language is Alba . Pliny the Elder, in his Natural History applies it unequivocally to Great Britain.
	Albite Albite is an alkali feldspar mineral. It is the sodium Endmember of the plagioclase solid solution series. As such it represents a plagioclase with less than 10% anorthite content. The pure albite endmember has the formula NaAlSi3O8. It is a Silicate minerals.
	Albizia Albizia is a genus of about 150 species of mostly fast-growing subtropical and tropical trees and shrubs in the Subfamily Mimosoideae of the legume family, Fabaceae. The genus is pantropical, occurring in Asia, Africa, Madagascar, Central America, South America, and southern North America and Australia, but mostly in the Old World tropics.