John Mundell, a member of the Archdiocese of Indianapolis Creation Care Commission, stands with a poster that references Swedish climate change activist Greta Thunberg during a march in Indianapolis Sept. 20, 2019. Dioceses and other organizations around the world are planning to mark the fifth anniversary of Pope Francis' encyclical on care for creation with online events and prayers during Laudato Si' Week May 16-24, 2020. (CNS/Archdiocese of Indianapolis Creation Care Commission)