The Amazon Fulfilment Centre prepares for Black Friday this year in Hemel Hempstead, England. Black Friday has now surpassed Cyber Monday as's busiest day. Jeff Spicer/Getty Images hide caption

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Oranges ripen in a grove in Plant City, Fla. Citrus greening, a disease spread by a tiny insect that ruins oranges and eventually kills the trees, has put the future of the state's $10 billion citrus industry in doubt. Chris O'Meara/AP hide caption

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