At least two California producers are doing their bit in sometimes innovative ways for the environment. Fetzer bottles go on a diet Adding to the growing list of wine producers who are reducing the weight of their bottles – and thus their greenhouse gas emissions - is California’s Fetzer Vineyards, which is putting its entire line of wines – some 23 million bottles a year – on a Slim-Fast diet. One of the largest wine producers in the US, Fetzer says it will reduce, on an annual basis, its glass usage by 16 per cent. On average, Fetzer says, its bottles will drop from 20.3 ounces (575 gm) to 17 ounces...