Thank you Salvation that’s something that struck me as well. Every time he proposes an idea he invites also discussion from everyone on the topic. This isn’t an Encyclical laying the law down or anything like that. It’s actually proposing more thought and discussion on the matter of environmental stewardship.
But, people will see what they want to see I guess.
** Papal encyclicals are generally fairly long documents containing a variety of points about one or more issues. Some or all of these points are often about things that are beyond the scope of papal infallibility, dealing with things other than faith or morals, or being directed to some segment of the church. Traditionally, encyclicals are circular letters addressed only to the bishops of the Church. They tend to be discussions of some pressing matter at hand.**
http://www.rosarychurch.net/answers/qa011996b.html