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Global Seed Vault becomes more important as climate changes
When you think of fresh produce and fields of grain, the Arctic may not spring to mind. But just 800 miles from the North Pole, the Global Seed Vault holds emergency stockpiles of most of the world's crops. It provides scientists with the tools they need to breed plants able to cope with a changing world. Special correspondent John Bevir visited the vault to learn more about the future of food.
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