In the first session, scheduled for Sept. 9, Valerie Pontiff, author of "All 63 U.S. National Parks. The Complete Travel Guide," will present Pope Francis' Apostolic Exhortation "Laudato Si'" (On the Care of Our Common Home), a call to engage in constructive dialogue about how we are shaping the future of our planet. In this document, we will hear Pope Francis urging the Church and the world to recognize our environmental challenges and inviting us to join him in embarking on a new responsible and "greener" path.