It pays to keep things in perspective. On a different front, I think Louie Verrecchio also has a point, though he is too broad in tone, when he wrote this:
As to the former, I think everyone might do well to imagine just how much worse it could be.
Think about it; we could be awaiting an encyclical on the mission of the Catholic Church, or the Person of Christ, or the nature of the priesthood, or the sacred liturgy, or Christian unity, etc.
Given that silence is clearly not an option for this pope, what would you rather have him address in the form of an encyclical; a matter directly related to some fundamental aspect of the Catholic Faith, or the pseudo-science of man made global warming?
Either way, faithful Catholics are destined to be embarrassed. That much, we know.
In the long run, however, I can’t help but think that it does less damage for Francis to ramble on matters environmental than to wax on anything theological.