A poster of Pope Leo produced by the Laudato Si Movement about the Raising Hope conference in Rome, where Pope Leo addressed the participants on Oct. 1, 2025.

Pope Leo Affirms Laudato Si, Calls for Action

Pope Leo XIV marks the tenth anniversary of Laudato Si’ with a resounding call for action on climate change, urging a spiritual conversion and renewed commitment to integral ecology.

Pope Leo XIV celebrated tenth anniversary of Laudato Si’ by delivered a resounding affirmation of the Church’s continuing commitment to care for our common home. Speaking to an international gathering of faith leaders, scientists, activists, and policymakers in Rome, he reminded us all that Laudato Si’ remains not simply an environmental document, but a profound call to spiritual conversion and action.

Pope Leo described Laudato Si’ as a “gift we have inherited” — one that has inspired many across the globe to give priority to the poor and to live out the Gospel by protecting creation. He celebrated the encyclical’s ability to reach people beyond Church walls, sparking collaboration among people of all faiths and goodwill.

Yet he made it clear that the work is far from complete: “The challenges identified in Laudato Si’ are even more relevant today than they were ten years ago.”

Our new pope stressed that ecological conversion must start from the heart and begin from deep within. “We must shift from collecting data to caring,” he said, urging the faithful to move from awareness to compassion, from study to service.

Pope Leo framed climate action as an integral part of the Christian faith, stating that ignoring creation is incompatible with loving God. He recalled Saint Francis of Assisi as a model of integral ecology, where love of God, neighbor, and creation are inseparable. He called the Church to nurture these four essential relationships — with God, with others, with nature, and with oneself — as the path to hope and peace.

“We are one family,” he reminded us, “inhabiting the same planet that we must care for together.”

The pope also challenged leaders and citizens alike to actively pressure their governments on climate change and advocate for stricter regulations, particularly as the world prepares for COP30 in Belém, Brazil. His closing question continues to be a clarion call to all Catholics: “God will ask us if we have cultivated and cared for the world He created… What will be our answer?”

FAITH IN ACTION: We are going to the UN Climate Change Conference in Brazil in November! Visit our website to find the latest news http://www.maryknollogc.org