Catholics believe that all creation is good and that evil is the wrong use of good and that without Grace we use it wrong most of the time.
Beyond doubt, [St.] Francis not only praised God’s gracious love bestowed on Francis, but showed concern for all of God’s creatures as well. It sprang from a sense of gratitude for God’s continuing gifts to Francis and all people. Francis probably didn’t know the word “ecology.” But he showed a consistent love for creation because it is God’s creation. He knew that relationship to God included a universal relationship to all of God’s creatures. They became his brother and sister.