Summary: Wine growers in Napa can no longer rely on the consistent fog and cool nights that brought the region global fame. Mother Jones politics reporter Kara Voght takes a break from covering the Hill and travels to Napa to learn about how vintners are coping—and why wine matters in the conversation about climate change. And Tom Philpott travels to Iowa to witness the wreckage from this year's flooding and to drink beer with a very spirited rye farmer.
