A man works at the Matetic vineyard in Casablanca valley, west of Santiago city, Chile, October 30, 2015. Well into their drive to make Chile's wines less about bang-for-your-buck and more about premium vino, vintners in the world's fourth largest wine exporter are watching some of their promising vines wither with climate change. Picture taken October 30, 2015. REUTERS/Ivan Alvarado