News (dtd 1 May 2009) from the National Science Foundation.
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News (dtd 4 May 2009) from the National Snow and Ice Data Center.
News (dtd 4 May 2009) from the National Oceanic and Atmospheric Administration.
News (dtd 1 May 2009) from the National Aeronautics and Space Administration.
2009 climate change report from the National Science Foundation.