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Scenic vistas in most U.S. parklands are diminished by haze that reduces contrast, washes out colors, and renders distant landscape features indistinct or invisible.

Protecting Visibility in National Parks and Wilderness Areas describes the current understanding of the nature and extent of haze in various regions of the United States. The book addresses the scientific and legal framework of efforts to protect and improve visibility, as well as methods for assessing the relative importance of anthropogenic emission sources that contribute to haze in national parks and for considering various alternative source control measures.

The volume provides guidance on how to make progress toward the national goal of correcting and preventing visibility impairment due to human activities affecting large national parks and wilderness areas.

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Suggested Citation

National Research Council. 1993. Protecting Visibility in National Parks and Wilderness Areas. Washington, DC: The National Academies Press. https://doi.org/10.17226/2097.

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Publication Info

464 pages | 6 x 9 | Paperback
ISBN: 978-0-309-04844-6
DOI: https://doi.org/10.17226/2097
Chapters skim
Front Matter i-xviii
Executive Summary 1-18
1 Introduction 19-28
2 Visibility Conditions in the United States 29-56
3 Legal and Institutional Context 57-80
4 Haze Formation and Visibility Impairment 81-142
5 Source Identification and Apportionment Methods 143-208
6 Emission Controls and Visibility 209-238
7 Conclusions and Recommendations 239-264
References 265-314
Appendix A: Scientific Background Information 315-324
Appendix B: Measurement Methods 325-358
Appendix C: Source Identification and Apportionment Models 359-406
Appendix D: Control Techniques 407-440
Appendix E: Comparing Visibility Control Strategies 441-447

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