What would happen if Oregon became too warm to consistently produce high-quality Pinot Noir, the notoriously sensitive grape behind its signature wine? A group of wineries and growers concerned about the effects of climate change have banded together to try to reduce their environmental impact. Now, nearly three years after they started, 14 of them—representing about 20 percent of the state's wine production—have completed the Carbon Neutral Challenge, a project to measure and cut greenhouse gases emitted by farming vineyards, producing wines and selling them globally.