Mar 30 1976
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No immediate serious problem appeared to exist in modification of the stratosphere, according to a report released by an interagency task force on inadvertent modification of the stratosphere (IMOS) prepared by the Interdepartment Committee for Atmospheric Sciences (ICAS). Assessing presently postulated manmade modifiers of the stratosphere other than fluorocarbons, the report considered 6 kinds of possible hazards: nitrogen fertilizers, brominated compounds, other chlorinated compounds, particles, the Space Shuttle, and carbon monoxide. The report concluded that concern over modification of the stratosphere was so far speculative, and that it was based on compounds not yet released to the upper atmosphere in quantities believed sufficient to produce a hazardous effect. Although a large number of substances had been considered, only those appearing most potentially harmful were singled out. Also, cumulative effects from several substances might become significant later, the report said, even if the effect of any single substance were relatively slight. The report urged increased research into stratosphere modifiers and prevention of inadvertent modification now and in the future. (IMOS report, 30 Mar 76)
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