California Gov. Jerry Brown, front, right, flanked by Minsignor Marcelo Sorondo, shows a paper during a workshop organized by Vatican on the climate change, at the Casina Pio IV, at the Vatican, Saturday Nov.4, 2017.
California Gov. Jerry Brown, front, right, flanked by Minsignor Marcelo Sorondo, shows a paper during a workshop organized by Vatican on the climate change, at the Casina Pio IV, at the Vatican, Saturday Nov.4, 2017. Alessandra Tarantino AP
California Gov. Jerry Brown, front, right, flanked by Minsignor Marcelo Sorondo, shows a paper during a workshop organized by Vatican on the climate change, at the Casina Pio IV, at the Vatican, Saturday Nov.4, 2017. Alessandra Tarantino AP