By David E. Newton
This interesting quantity offers readers an intensive figuring out of each side of the ozone debate.
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Additional resources for The Ozone Dilemma: A Reference Handbook (Contemporary World Issues)
Two years later NASA scientists took the unusual step of calling a news conference about the ozone studies even before those studies had been completely analyzed. They announced that the Earth's ozone layer worldwide had been depleted by 2 to 3 percent in the preceding Page 8 year. Ozone loss varied according to latitude, with virtually no loss above the equator and substantially higher loss at higher latitudes. They said that their observations were significantly in excess of what had been predicted by existing theories.
This treatment would destroy the CFCs before they get into the atmosphere, thus reducing the damage they do to ozone there. It is relatively easy to test a technological fix in the laboratory. When such tests are made on the preceding suggestions, both appear to be workable schemes. But other factors are involved in any actual use of the techniques in the real world. In the case of hydrocarbon release, for example, experts estimate that hundreds of aircraft would be needed over an extended period of time in order to carry out the spraying necessary to have any effect on CFCs in the atmosphere.
In addition, satellites are employed to collect data. One of the most useful devices has been the Total Ozone Mapping Spectrometer (TOMS) originally located on board NASA's Nimbus-7 weather satellite. TOMS has sent back computer-generated "pictures" of ozone concentrations that dramatically show the formation and disappearance of the ozone hole during each austral spring. Page 7 By 1987, most nations of the world had become convinced that the Earth's ozone layer was threatened and that CFCs were a major culprit in this problem.