Bloomberg: Terraced vineyards meander along the Douro River in Portugal. The hillsides allow Port producers to plant in higher or lower elevations depending on weather. (Fladgate Partnership Vinhos S.A)To paraphrase Shakespeare, in the vineyards of the world, something worrisome this way comes. Over the last decade, global warming has started affecting those narrow zones best suited for growing wine grapes.
Warmer temperatures are a mixed blessing for winemakers. In colder climates like Bordeaux and Burgundy,...