Some 750 years after the saint’s death, on 29 November 1979, Pope John Paul II declared Saint Francis the Patron Saint of Ecology. Successive Popes continued to use St. Francis as a model in their public comments over the years:
"…not to behave like dissident predators where nature is concerned, but to assume responsibility for it, taking all care so that everything stays healthy and integrated, so as to offer a welcoming and friendly environment even to those who succeed us."
"As a friend of the poor who was loved by God's creatures, Saint Francis invited all of creation – animals, plants, natural forces, even Brother Sun and Sister Moon – to give honor and praise to the Lord. The poor man of Assisi gives us striking witness that when we are at peace with God we are better able to devote ourselves to building up that peace with all creation which is inseparable from peace among all peoples."
"It is my hope that the inspiration of Saint Francis will help us to keep ever alive a sense of 'fraternity' with all those good and beautiful things which Almighty God has created."
“St. Francis teaches us that, the world of God and the world of nature are one."