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Executive Summary
Pages 3-6

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From page 3...
... Much of the current understanding of the earth's troposphere has arisen from a decade or more of intensive investigation of urban air pollution, the chemistry of the stratosphere, and the physics of the climate and from some exploratory studies of the nonurban troposphere. Yet, fundamental questions remain unanswered about the basic state and dynamical response patterns of the global tropospheric chemical system.
From page 4...
... Examples include acid precipitation with its regional and hemispheric scale impacts; unexpected disturbances to the stratospheric ozone layer resulting from ground-level emissions of several trace gases; and the potential effects of several trace gases, including carbon dioxide, on the earth's climate. Time and money have not been available for the development of the systematic measurement and modeling programs required to anticipate possible future perturbations of the global troposphere and to respond knowledgeably to such events when they occur.
From page 5...
... Although several federal agencies are now conducting and supporting research that addresses various aspects of global tropospheric chemistry, their current programs are not adequate to achieve the goals of the recommended Global Tropospheric Chemistry Program. Federal support is currently focused on urban or regional problems, such as air pollution or acid rain, or on questions related to climate, such as carbon dioxide buildup.
From page 6...
... The Global Tropospheric Chemistry Program represents a fundamental step toward understanding and predicting effects of human society on the planetary life support system. Benefits from this program will transcend national boundaries and extend to all.


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