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» False lantern dome
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One term for the 'domes' made by Hindu architects who, refusing to acknowledge the existence of vaults and domes, used corbelling techniques to achieve similar effects. |
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» FANSIGHAR
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Labyrinthine set of underground rooms in Mogul palaces. |
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» Fly ash
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The fine ash waste collected by flue gases from coal burning power plants, smelters, and waste incinerators. Fly ash can be used as a cement substitute in concrete, reducing the concrete's embodied energy. |
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» Fossil fuels
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Fuels found in the Earth's Strata that are derived from the fossilized remains of animal and plant matter over millions of years. Fossil fuels include oil, natural gas, shale, and coal. Fossil fuels are considered nonrenewable since they are consumed faster than they are naturally produced. |
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» Fuel cell
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An electrochemical device in which hydrogen is combined with oxygen to produce electricity with heat and water-vapor as by-products. Natural gas is often used as the source of hydrogen, with air as the source of oxygen. Since electricity is produced by a chemical reaction and not by combustion, fuel cells are considered to be green power producers. Fuel-cell technology is quite old, dating back to the early days of the space program. Commercial use of fuel cells has been sporadic, although they are expected to be widely used in automobiles and buildings over the next decade. |
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» Fundamentalism
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A movement that arose at the beginning of the 20th century to reaffirm the tenets of orthodox Protestant Christianity and to defend the faith militantly against the challenges of liberal theology, higher criticism, and Darwinism. |
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