The Napa Valley is just 30 miles long and 5 miles wide, but at last count it was home to nearly 500 wineries. Fortunately, most of these are committed to sustainable winemaking: More than 65 percent of Napa Valley Vintners’ members participate in the Napa Green Certified Land and/or Napa Green Certified Winery programs, and more than 40 wineries have comprehensive Soil-to-Bottle certification in both. Over 55 percent (more than 24,000 acres) of Napa Valley’s vineyard acreage is certi