VATICAN CITY – After a week marked by acts of simplicity and openness, Pope Francis finally let his words do the talking as he officially began his stewardship of the Catholic Church on Tuesday.

“Please,” he implored the tens of thousands, both poor and powerful, gathered outside St. Peter’s Basilica. “Let us be protectors of creation, protectors of God’s plan inscribed in nature, protectors of one another and of the environment.”

It was a message Pope Francis has hinted at, but now he made it clear, as he urged the economic, political and religious leaders arrayed before him not to allow “omens of destruction and death to accompany the advance of this world.”