Thank you for pointing that out. I am trying to find a transcript of the address.
Here is how Vatican Radio translates that phrase:
“Pope Francis said “our planet is a mother for all of us,” it asks for respect and not violence, or worse still, the arrogance of masters. We must hand it on to our children, cared for and improved, because it’s a loan they make to us. And it’s not just Christians who should adopt this approach for safeguarding our earth, it’s the responsibility of everyone, he said. But in order to do that, pointed out the Pope, we need to take care of ourselves and not be afraid of goodness, or rather tenderness. We need “to safeguard the earth not only with goodness but also with tenderness.”
This is really quite different in both meaning and context.