After being summoned to the Vatican to advise on climate change, Dan Kammen of UC Berkeley shares an insider's view on what inspired Pope Francis to issue such a passionate plea to protect the earth in Laudato Si, his 2015 encyclical on the environment. As a practicing Catholic, former Michigan Governor Jennifer Granholm praises the Pope for presenting "human ecology" as a moral issue in this lively exchange with Kammen and Henry E. Brady, dean of the Goldman School of Public Policy at UC Berkeley. (#29853)