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National Parks
Revised with a new epilogue, “We the People,” this fifth edition of National Parks: TheAmerican Experience continues the highly engaging story of how Americans invented and expanded the concept of national parks. A prominent adviser to the Ken Burns Emmy Award-winning documentary, "The National Parks: America's Best Idea," Alfred Runte is renowned as the nation's leading historian on the meaning and management of these treasured lands. Further supported with period photographs and now twelve pages of color paintings, National Parks remains a stirring look into the lands that define America, from Yosemite and Yellowstone to wilderness Alaska. This is how we got our parks, and looking to the future, the challenges that remain in preserving them. Are “we the people” still up to the task? Yes, this history advises, but only if we consistently cherish the national unity that our commitment to the parks further demands.
Tropospheric Ozone
The main objective of the workshop was to increase our knowledge of ozone formation and distribution in the troposphere, its relation to precursor (NO~ and HC species) distribution, how it is affected by transport processes in the troposphere, and to show how the increasing levels of ozone can cause environmental problem. The focus was on the interaction of ozone on regional and global scales. There is mounting evidence that such interactions occur and that the ozone levels are increasing in most of the Northern Hemisphere tropo sphere. A likely source of ozone increase is human activity. As result of this, tropospheric climate may change significantly within a few decades, either through di...
