Yosemite National Park Air Resources

Air pollution is currently recognized as one of the most significant threats to the resources of the Sierra Nevada. Sources are local, regional, and in some instances, global. The National Park Service in cooperation with state and other federal agencies are making concerted efforts to reduce the damage caused by air pollution. This is done by an intensive monitoring program, support for research, and expanding the education of park visitors and those concerned about the future of Yosemite National Park.

Air quality has a dramatic impact on visibility in the Yosemite Valley. Move your pointer over the image to see a clean-air day in the Valley. Alternative image here for non-JavaScript browsers.

Additional Nature and Science Topics for Yosemite

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November's Featured Park
The North Cascades have long been known as the North American Alps. Characterized by rugged beauty, this steep mountain range is filled with jagged peaks, deep valleys, cascading waterfalls and glaciers. North Cascades National Park Service Complex contains the heart of this mountainous region in three park units which are all managed as one and include North Cascades National Park, Ross Lake and Lake Chelan National Recreation Areas.
November's Animal
Badgers are animals of open country. Their oval burrows (ten inches across and four to six inches high) are familiar features of grasslands on sandy or loamy soils of the eastern plains or shrub country in mountain parks or western valleys.