['Wine is high in acid. The first thing to know is that wine is a tart beverage. ... ', 'The influence of climate. ... ', 'Popular low-acid whites: Viognier, Marsanne and Semillon. ... ', 'Acid vs. ... ', 'Popular low-tannin reds: Pinot Noir, Sangiovese, Gamay (or Beaujolais wine), Barbera, Tempranillo.']