Champagne's Carbon Footprint

The Wine Spectator is apparently reporting that Champagne producers are exploring ways to reduce their carbon footprint. I haven't seen the article yet, but it strikes me as somewhat amusing to think that a carbonated beverage producer is thinking about reducing their carbon emissions. Correct me if I'm mistaken, but the bubbles in champagne are pure carbon dioxide. Every time you drink champagne, your carbon footprint goes up. Arrrgh.