Word: use
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Dates: during 1970-1979
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...mystery remains. Dr. Jack Bryan, chairman of veterinary science at the University of Kentucky, ticks off the contributions of his profession to the sport, from the use of antibiotics to treat barn cough to new surgery techniques to remove bone chips. Then he admits, "I don't think they have anything to do with it. A Triple Crown winner is a running machine with courage. Nobody knows where that comes from...
...most common solar devices, accounting for 95% of sales, are the flat, boxlike, conventional thermal units that sit on rooftops. These use the sun's rays to heat water, which in turn heats home water systems. A basic series of units for a one-family home costs about $2,000 and saves only about $40 a year in fuel bills. The promising new frontier is photovoltaics, the direct conversion of sunlight into electricity by using silicon-crystal panels. Though the price of photovoltaic cells has been cut in half since 1975, the cost is still $9 per watt,*equal...
Wood is by far the most promising popular biomass fuel, especially in the thickly forested areas. In northern New England, where energy costs 26% more than the national average, nearly 20% of all homes rely on wood as a primary heating source. Its use has grown sixfold since 1970 because 1) new, all-enclosed wood stoves increase heat efficiency way above that of open fireplaces, and 2) new central-heating furnaces that burn both wood and oil can save up to 200 gal. of oil for each cord (128 cu. ft.) of wood consumed. A New England Congressional Caucus study...
...that force is difficult to harness. The British, French and Japanese are working on wave-power projects. Most involve some kind of rafts hinged together by pistons; the rocking motion forces the pistons to pump water that turns turbines. A different U.S. plan, now being studied by Lockheed, would use a 250-ft.-diameter man-made "atoll" tethered at sea. Looking like a giant doughnut, it would float with its top just above the surface. The waves surging across the rim would flow down the center hole and turn a turbine...
Ocean Thermal Energy Conversion (OTEC) devices, which get power from the 45° F temperature differential that can exist between surface tropical water and the deep, are being studied by both Lockheed and TRW Inc. The idea is to use the warmer water to heat liquid ammonia into gas, which would drive a turbine, and then draw up cold water through long pipes to recool the gas into liquid. Tested as early as the 1930s, the idea has been shown to work, but it has never been very economical. A 10,000-Mw complex, enough for 6.6 million people, would...