THE DILEMMA I like a glass of wine or two, but how do I choose a variety that is sustainable, doesn't deplete the planet and isn't full of chemicals? The responsible drinking debate in the UK tends to be one note, centering on teenage drinking and white ciders. But there are other factors: wine might be a non-essential luxury good, but its impact is large. Worldwide growth and production makes up 0.1% of all man-made greenhouse gas and there are huge concerns over the impact of climate change on the industry. The broad-brush analysis is this: more chardonnay (robust, easily grown grapes), less Pinot Noir (a more sensitive grape) and a possible boon for the UK's home-grown industry owing to rising temperatures.