Pope Francis waves from the popemobile to pilgrims as he arrives for the welcoming ceremony of World Youth Day (WYD) gathering of young Catholics, at Eduardo VII Park in Lisbon on August 3, 2023. Pope Francis today urged young people to focus on caring for the planet and fighting climate change, calling for an "integral ecology" that melds environmental protection with the fight against poverty and other social problems. Around one million pilgrims from around the world will attend the World Youth Day, the largest Catholic gathering in the world, created in 1986 by John Paul II. (Photo by Pierre-Philippe MARCOU / AFP)