Consumers don't have access to much information about how businesses operate, but they can ask questions and focus on one tangible item, the bottle.

The exquisite vulnerability of grapes to nuances of weather makes wine both particularly susceptible to climate change and a harbinger of what's to come for many other agricultural products.

Do wine consumers have a role in encouraging producers to take stronger steps to combat climate change? Some in the wine industry think they do, particularly by throwing their economic support to companies that are already acting decisively.

"The consumer is the key to this," Adrian Bridge,

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