(PRNewswire) - Month-long Campaign - Coinciding with Earth Day - Highlights State's Sustainable Winegrowing and Winemaking California is more than cool - it's Down to Earth! A new, month-long celebration, "California Wines: Down to Earth" shines a spotlight on sustainability. From "green wine trails" and Earth Day wine and food festivals to special eco-tours in the vineyard, California's winemakers and winegrowers are offering a wide variety of fun, sustainably-focused festivities throughout the month of April