Out of the park: New research tallies total c

<p>New research makes a case study of Yellowstone National Park &mdash; calculating surplus carbon that visitors from across the world add to the atmosphere each year as a direct result of a park visit.</p>

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Jordan Smith ,Emily Wilkins ,Quinney College Of Natural Resources ,Department Of Environment ,Institute Of Outdoor Recreation ,Us Geological ,Yellowstone National Park ,Method Of Research ,Quinney College ,Natural Resources ,Outdoor Recreation ,Yellowstone National ,