Gov. Jerry Brown, center, flanked by Baden-Wurttemberg Minister-President Winfried Kretschmann, left, of Germany, and Baja California Gov. Francisco A. Vega de Lamadrid, join others in signing a non-binding climate change agreement in Sacramento, Calif., Tuesday, May 19, 2015. The memorandum of understanding calls for limiting the increase of global warming average to below 2 degrees Celsius.
Gov. Jerry Brown, center, flanked by Baden-Wurttemberg Minister-President Winfried Kretschmann, left, of Germany, and Baja California Gov. Francisco A. Vega de Lamadrid, join others in signing a non-binding climate change agreement in Sacramento, Calif., Tuesday, May 19, 2015. The memorandum of understanding calls for limiting the increase of global warming average to below 2 degrees Celsius. Rich Pedroncelli AP
Gov. Jerry Brown, center, flanked by Baden-Wurttemberg Minister-President Winfried Kretschmann, left, of Germany, and Baja California Gov. Francisco A. Vega de Lamadrid, join others in signing a non-binding climate change agreement in Sacramento, Calif., Tuesday, May 19, 2015. The memorandum of understanding calls for limiting the increase of global warming average to below 2 degrees Celsius. Rich Pedroncelli AP