Ozone threatens the health of park visitors and contributes to the disease and death of park species such as the black cherry tree in the East and aspen and ponderosa pine in the West. National park ecosystems across the country are already showing damage from ground-level ozone pollution.

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  • Blog Post

    Yosemite Valley to Herself, After a Wait

    Apr 2021 | By Kati Schmidt

    Parks including Glacier, Rocky Mountain and Yosemite are using reservation and timed-entry systems to help manage heavy crowds — a problem that long preceded the pandemic. While these changes…

  • Blog Post

    7 Places Worth Saving

    Apr 2021 | By Matthew Kirby, Jennifer Errick

    By protecting the areas surrounding national parks, the U.S. can build resilient landscapes that prevent the worst effects of climate change and species loss. But we must act soon…

  • Blog Post

    The Park That Made COVID Testing Possible

    Apr 2021 | By Jennifer Errick

    A bacterial discovery at Yellowstone 55 years ago has been key to the development of PCR testing, the most reliable way to know whether someone has COVID-19.