A broad public discussion of environmental problems began in the mid-1980s, when the first " green " groups formed in opposition to Yerevan's intense industrial air pollution and to nuclear power generation in the wake of the 1986 reactor explosion at Chernobyl '.

* 1709 – Bartolomeu de Gusmão demonstrates the lifting power of hot air in an audience before the King of Portugal in Lisbon, Portugal

If enough electric power is available, cooling can be provided by conventional air conditioning using a heat pump.

The unit is most often used in the power, steam generation, heating and air conditioning industries.

In North America, the term " Btu " is used to describe the heat value ( energy content ) of fuels, and also to describe the power of heating and cooling systems, such as furnaces, stoves, barbecue grills, and air conditioners.

Blitzkrieg ( German, " lightning war "; ) is an anglicised word describing all-motorised force concentration of tanks, infantry, artillery, combat engineers and air power, concentrating overwhelming force at high speed to break through enemy lines, and, once the lines are broken, proceeding without regard to its flank.

By the summer of 1944 the reversal of fortune was complete and Operation Bagration saw Soviet forces inflict crushing defeats on Germany through the aggressive use of armour, infantry and air power in combined strategic assault, known as deep operations.

Launched in poor weather against a thinly held Allied sector, it achieved surprise and initial success as Allied air power was stymied by cloud cover.

On 24 April 1946 Chief of Naval Operations Admiral Chester Nimitz issued a directive ordering the formation of a flight exhibition team to boost Navy morale, demonstrate naval air power, and maintain public interest in naval aviation.

In industrial fired heaters, power station steam generators, and large gas-fired turbines, the more common way of expressing the usage of more than the stoichiometric combustion air is percent excess combustion air.

* Air compressor, a device specifically for compressing air to power other tools

** Solar air conditioning, air conditioning using solar power

A turbocharged engine can produce significantly more power than a naturally aspirated engine of the same configuration, as having more air in the cylinders allows more fuel to be burned and thus more power to be produced.

Nearly 75 % of Estonia's air pollution was reported to come from two oil shale-based thermal power stations operating near Narva.

Environment – current issues: air heavily polluted with sulfur dioxide from oil-shale burning power plants in northeast ; contamination of soil and groundwater with petroleum products, chemicals at former Soviet military bases ; Estonia has more than 1, 400 natural and artificial lakes, the smaller of which in agricultural areas are heavily affected by organic waste ; coastal sea water is polluted in many locations.

Forced air induction by turbocharging and supercharging have increased power outputs and engine efficiencies.

air pollution from manufacturing and power plants contributing to acid rain ; water pollution from industrial wastes, agricultural chemicals ; habitat loss threatens wildlife populations

* The Haynes Aero Skyblazer is a development stage vehicle that uses a single turbofan engine to provide thrust in the air and to generate electricity to power electric motors for ground travel.

Motive power on the ground and in the air is by hydraulic drive and therefore no added gearbox is required.

They quickly gained air superiority over the Allies, who at this stage of the war were often disorganized, under-trained and poorly equipped, and Japanese air power contributed significantly to their successes in the Philippines, Malaysia and Singapore, the Dutch East Indies and Burma.

As the world began to take on the guise of an immense air raid or gas oven, I believe his art became meaningless to him.

By 1980 the infrequency of sightings of Mount Ararat, which looms about sixty kilometers across the Turkish border, became a symbol of worsening air pollution in Yerevan.

In keeping with the prevailing view of celestial bodies as balls of fire in the sky, Anaximenes proposed that the earth let out an exhalation of air that rarefied, ignited and became the stars.

With the development of effective anti-aircraft artillery in the period before the Second World War, military pilots, once the " knights of the air " during the First World War, became far more vulnerable to ground fire.

When surface to air missiles became capable of hitting high flying aircraft bombers, bombers used flight at low altitude to evade radar detection.

Allied air superiority became a significant hindrance to German operations during the later years of the war.

However when combined with land mines, snipers, barbed wire, and air cover, crossfire became a difficult tactic to counter in the early 20th century.

Following the fall of the Shah of Iran and the Iran Hostage Crisis in 1979 – 1980, the West became concerned with ensuring the flow of oil from the Persian Gulf through the Strait of Hormuz, and the US received permission for a $ 400 million expansion of the military facilities on Diego Garcia consisting of two parallel runways, expansive parking aprons for heavy bombers, 20 new anchorages in the lagoon, a deep water pier, port facilities for the largest naval vessels in the US or British fleet, aircraft hangars, maintenance buildings and an air terminal, a fuel storage area, and billeting and messing facilities for thousands of sailors and support personnel.

* The modern Environmental movement, which began in the 1960s with concern about air and water pollution, became broader in scope to including all landscapes and human activities.

As the public became more aware of environmental issues, concern about air pollution, water pollution, solid waste disposal, dwindling energy resources, radiation, pesticide poisoning ( particularly as described in Rachel Carson's influential Silent Spring, 1962 ), noise pollution, and other environmental problems engaged a broadening number of sympathizers.

Cleaning up the heavy air and water pollution became a major industry in its own right.

Later when Paris was encircled by German troops, Gambetta fled Paris by means of a hot air balloon and he became the virtual dictator of the war effort which was carried on from the rural provinces.

After the US bombings of Hiroshima and Nagasaki, Bernard claimed, the Atlanteans became concerned that radioactive air might flow into the world's interior, and so some emerged in their flying saucers in an act of self-defense.

It was not the world's first air force, because France's embryonic army air service, which eventually became the French Air Force ( Armée de l ’ Air ), was founded in 1909.

The air war on the Western Front received the most attention in the annals of military aviation, since it produced aces such as Manfred von Richthofen, popularly known as the Red Baron, Ernst Udet, Hermann Göring, Oswald Boelcke, Werner Voss, and Max Immelmann ( the first airman to win the Pour le Mérite, Imperial Germany's highest decoration for gallantry, as a result of which the decoration became popularly known as the Blue Max ).

The next year, " In the Waiting Line ", directed by Tommy Pallotta and animated by Randy Cole, became the first machinima music video to air on MTV.

With the occupation of airbases by American forces it became clear how destitute the air force had been since the withdrawal of the Soviet Union.

Neon was discovered when Ramsay chilled a sample of air until it became a liquid, then warmed the liquid and captured the gases as they boiled off.

When León became the first city in Nicaragua to fall to the Sandinistas, he responded with aerial bombardment, famously ordering the air force to " bomb everything that moves until it stops moving.

Skeptics such as Milbourne Christopher have found that some cases of poltergeist activity can be attributed to unusual air currents, such as a 1957 case on Cape Cod where downdrafts from an uncovered chimney became strong enough to blow a mirror off of a wall and knock things off shelves.

Musharraf had severe confrontation and became involve in serious altercations with his senior officers, chief of naval staff Admiral Fasih Bokhari, chief of air staff, air chief marshal PQ Mehdi and senior lieutenant-general Ali Kuli Khan.

Swiss importers added a little artisanal circuit, with specific IC, for France L norm, tuner became multistandard, but VCR record French broadcasts, on air, in MESECAM, the tapes are played in black and white on SECAM players, and SECAM tapes played B / W in these modified tuner VCR.