Case Studies

Find case studies and success stories about alternative transportation technologies and alternative fuels.

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Alternative Fuels Help Ensure America's National Parks Stay Green for Another Century

In its vigilance to protect the parks, the National Park Service (NPS) teamed with the U.S. Department of Energy (DOE) through the Clean Cities National Parks Initiative (CCNPI), a collaboration specifically aimed at bringing together the resources of the Clean Cities program and the NPS to minimize petroleum use and reduce emissions in the parks.

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