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Brent Fernandez, who teaches Catholic social teaching at Father Ryan High School in Nashville, Tenn., tends the school garden with some of his students Aug. 12, 2015. Fernandez was one of many theology and science teachers at the three Catholic high schools in the Diocese of Nashville who planned to incorporate Pope Francis' encyclical, "Laudato Si'," into their curriculum for the school year. (CNS/Theresa Laurence, Tennessee Register)