In France, the rise in temperatures may render the Champagne region too hot to produce fine champagne. The same is true for the legendary reds of Châteauneuf du Pape, where the stony white soil's ability to retain heat, once considered a virtue, may now become a curse. The world's other major wine-producing regions—California, Italy, Spain, Australia—are also at risk.
I think it's all about altitude. Moving up higher in the Coast Range of Oregon, for example, might be the solution over the long term. Or up into the Cascades.
