"Uranium 2011: Resources, Production and Demand", commonly referred to as the "Red Book", shows that total identified uranium resources have grown 12.5% since 2008. However, the costs of production have also increased, leading to reductions in lower cost category resources. These figures, which reflect the situation as of 1 January 2011, mean that total identified resources are sufficient for over 100 years of supply based on current requirements.
http://www.iaea.org/newscenter/pressreleases/2012/prn201219.html
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http://www.iaea.org/newscenter/pressreleases/2012/prn201219.html
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