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One moment, please subprime refinance loan In 2000, the phrase "peak oil" occurred just 2.5 times inevery billion words published in English, according to Google'sN-gram language-analysis tool, which can search an enormouscorpus of books, articles and websites published in English andother languages. By 2008, the number of references had risen65-fold to 160 occurrences per billion words (Chart 1).
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