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trade winds
(Encyclopedia) trade winds, movement of air toward the equator, from the NE in the Northern Hemisphere and from the SE in the Southern Hemisphere. The trade winds originate on the equatorial sides of…producer gas
(Encyclopedia) producer gas, fuel gas consisting chiefly of carbon monoxide and nitrogen. It is prepared in a furnace or generator in which air is forced upward through a burning fuel of coal or coke…heating
(Encyclopedia) CE5 Typical warm-air heating system heating, means of making a building comfortably warm relative to a colder outside temperature. Old, primitive methods of heating a building or a…air traffic control
(Encyclopedia) air traffic control, the system by which airplanes are safely routed into and out of major airports. Air traffic control in the United States is centered in a number of regional…A. E. Housman: Into my heart an air that kills
Into my heart an air that kills From yon far country blows: What are those blue remembered hills, What spires, what farms are those?That is the land of lost content, I see it shining plain…Air Quality in Selected U.S. Cities, 1990–2000
(number of days with AQI values greater than 100)1 Metropolitan statistical area 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Atlanta, Ga. 42 23…Cleanest U.S. Cities for Ozone Air Pollution 2007
Ozone acts as a powerful respiratory irritant at the levels frequently found in most of the nation's urban areas during summer months. Symptoms include shortness of breath, chest pain…Air Distances Between U.S. Cities in Statute Miles
Cities Birmingham Boston Buffalo Chicago Cleveland Dallas DenverBirmingham, Ala. — 1,052 776 578 618 581 1,095Boston, Mass. 1,052 — 400 851 551 1,551 1,769Buffalo, N.Y. 776 400 — 454 173 1,…Air Distances Between World Cities in Statute Miles
Cities Berlin Buenos Aires Cairo Calcutta Cape Town Caracas ChicagoBerlin — 7,402 1,795 4,368 5,981 5,247 4,405Buenos Aires 7,402 — 7,345 10,265 4,269 3,168 5,598Cairo 1,795 7,345 — 3,539 4,…Langley Air Force Base
(Encyclopedia) Langley Air Force Base, U.S. military installation, 3,195 acres (1,293 hectares), SE Va., N of Hampton; est. 1917 and named for aviation pioneer Samuel P. Langley, amalgamated 2010…Trending
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