VATICAN ( and//www.catholicnewsagency.com/ CNA/EWTN News ) - One of the most challenging scientific questions Pope Francis faces in his new encyclical on creation is that of climate change, which a source close to the document says the Pope addresses in a balanced perspective without taking sides. The great novelty which emerges from the encyclical is that it comes from a shepherd who’s thinking of all those who are his,” a source familiar the encyclical has said.