I have not heard much at my parish yet, but it is summer in South Florida, so nothing much happens now anyway.
I have not read the encyclical, but I have read parts of it. In discussions with GW alarmists and libertarians, both camps claim the Pope says more than he does in the encyclical.
Perhaps that is spin from other sources; headlines and articles. Popes are usually very precise in wording encyclicals, and it seems to me that a lot of people claim it says things that it does not.
Saving features: (1) he does admit that this is just "discussion", not "doctrine" (although in tone he's by turns dialoguing and pontificating), and (2) it's so internally twisty-tailed around I don't think it's going to get a wide readership.
As far as I can see, it's basically a hash of "United Religions" and "Agenda 21".
Being used by the Left? To the hilt, and apparently that's OK by him.
God save Pope Francis.
God save the Catholic Church.