ALEXANDRIA, Va. (May 1, 2019) - Clean air is vitally important for Shenandoah National Park -- and now you can learn more about its connection to the park through an interactive "Virtual Field Trip" launched this week by the National Park Service in partnership with the American Geosciences Institute (AGI). We like to celebrate the many benefits of clean air every day, but we are especially excited to unveil this virtual field trip during Air Quality Awareness Week, April 29-May 3, 2019.