The Pope has no authority to do this, and nobody in the Church has any obligation to accept it.
This Pope is a leftist, a fool and probably only got to be pope through chicanery and politicking. (Also, I’ll never be convinced that he wasn’t involved in forcing BXVI to resign.)
Whatever he says that conflicts with or does not support the established doctrine of the Church can be dismissed. It’s just his opinion.
He’s very autocratic and has intimidated and silenced many people, in addition to the opposition he has just (borderline illegally) removed and sent to Siberia. So people are scared of him.
But nobody has to accept anything he says unless it is in harmony with Catholic doctrine...and this would not be. Man is the gardener of the garden, and while creation may be his responsibility, it has no rights of its own. Especially as defined by an elderly Argentinian who hasn’t had a real job in his life where he supported himself, and who lives in a clerical residence in Rome, tended by nuns.
I'm convinced he's Peter the Roman.