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1 THE NEED FOR A PROGRAM
Pages 7-10

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From page 7...
... On the basis of extant data on the visible and ultraviolet light spectrum of the sun, one could speculate that stratospheric O3 was important as an ultraviolet shield, but other possible absorbers were unexplored. Tropospheric 03, although known to be a product of photochemical reactions in urban smog, was little more than a curiosity when detected in clean background air.
From page 8...
... on the entire background tropospheric chemical system and the earth's climate. Indeed, the combined effects of CH4, nitrogen oxides, chlorofluoromethanes, and other Acid Deposition: Atmospheric Processes in Eastern North America, A Review of Current Scientific Understanding, Committee on Atmospheric Transport and Chemical Transformation in Acid Precipitation, National Academy Press, Washington, D.C., 1983, 375 PP 2Atmosphere-Biosphere Interactions: Toward a Better Understanding of the Ecological Consequences of Fossil Fuel Combustion, Committee on the Atmosphere and the Biosphere, National Academy Press, Washington, D.C., 1981, 263 pp.
From page 9...
... The present state can now permit more progress to be made from more systematic research. For example, the potential effects of human activities on the atmosphere can be better quantified and future problems can be anticipated on the basis of a growing understanding of the pathways of atmospheric chemical transformations and dynamics and from a growing data base on atmospheric chemical composition.
From page 10...
... The development of instrumentation and advanced numerical models is being conducted in a number of laboratories that have demonstrated excellence. Highly skilled individuals are available to perform the research, and many of these individ PART I A PLAN FOR ACTION uals are already mounting research activities very relevant to the proposed research.


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