On any given morning in Puerto Vallarta, the soundtrack is familiar. Waves roll onto the shore, vendors set up for the day and the hum of life settles in across one of Mexico’s most beloved coastal cities. And inside a home office overlooking a landscape better known for vacations than global advocacy, Suzanne York is working on some of the world’s biggest challenges. Suzanne York, director of Transition Earth, has been living and working in Pue…