LiveScience: Pope Francis has drawn the world's attention with a new encyclical that urges action on climate change. But will it have an impact?
The papal letter, titled "Laudato si," or "On Care for Our Common Home," paints a bleak picture of Earth as sick and poisoned at almost every level.
"The earth, our home, is beginning to look more and more like an immense pile of filth," Pope Francis wrote in the document, which is typically sent to bishops of all Roman Catholic churches. [6 Unexpected Effects...