Word: aerosols
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...AEROSOL: A DEFENSE. Over the past two years, several scientists have become concerned about fluorocarbon propellants, used in aerosol sprays, drifting up through the stratosphere. In their doomsday scenario, these fluorocarbons break down to form chlorine atoms that gradually destroy the ozone shield protecting the earth from an overdose of the sun's ultraviolet rays; this, in turn, increases the risk that humans down on earth will develop skin cancer...
...200th anniversary this week with ceremonies and pageants. Later Army exhibits will emphasize contributions made by the military to civilian life. These include the building of the Panama Canal as well as some lesser-known examples of Army pioneering: development of freeze-dried foods and the invention of the aerosol...
...Oregon last week heeded the warning by scientists that some gases in aerosol sprays can destroy the ozone layer in the stratosphere that protects earth from an overdose of the sun's ultraviolet rays (TIME, Oct. 7). The state legislature banned the sale after March 1, 1977, of aerosol cans that use chlorofluorocarbon compounds as propellants-mainly hair sprays, oven cleaners, insecticides and deodorants. Opponents of the measure claim that there is no hard evidence that the chlorofluorocarbons actually damage the ozone layer. But the Oregon lawmakers preferred not to wait for final proof, and the bill is expected...
Michael B. McElroy, Rotch Professor of Atmospheric Science, told a federal task force in Washington that fluorocarbon gases used in aerosol sprays and refrigerants are reducing the ozone layer, which screens out dangerous ultra-violet radiation...
...artery, leaving an area of dead tissue where no blood is circulated to take up oxygen. Then the doctors ran a second test to determine whether Nixon's respiratory passages were open to this area and thus rule out any other lung disease. For this, Nixon inhaled an aerosol containing radioactive technetium. This time the scanner showed no obstruction...