>> lurton: yes, ex-- exactly.have never seen such a large quantity of good vintages of bordeaux wines. >> stahl: well, explain that. that's counterintuitive. >> lurton: thanks to the global warming and the climate change, now we have warmer summers and which means that our grapes are ripening better. if we get good, warm conditions, we have good color quantity in the-- in the skin. but, as well, we have the right amount of sugar. >> stahl: what a painful irony-- the taste improves just as the yields are shrinking for winemakers like christine sevillano. so, more quality, but fewer grapes. dramatically fewer grapes. >> sevillano: yes. it's crazy. >> stahl: if you have another year like this one, financially, can you survive? >> sevillano: it will be difficult. really, really difficult. but at the same time, i'm trustful for next year. i mean, i'm trustful. i have to. >> stahl: improved taste is not the only unforeseen benefit of climate change for some winemakers. how it's affecting the bubbly you are likely to enj