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  • "Arctic sea ice melts to 2nd-lowest level on record." USA Today. Aug. 27, 2008.http://www.usatoday.com/weather/climate/2008-08-27-arctic-sea-ice_N.htm
  • Connor, Steve. "Global warming 'past the point of no return.'" The Independent. Sept. 16, 2005.http://www.independent.co.uk/news/science/global-warming-past-the-point-of-no-return-507030.html
  • Global Warming. The New York Times.http://topics.nytimes.com/topics/news/science/topics/globalwarming/index.html
  • Harris, Richard. "Global Warming Is Irreversible, Study Says." All Things Considered. NPR.org. Jan. 26, 2009.http://www.npr.org/templates/story/story.php?storyId=99888903
  • Maugh, Thomas H. II. "Study says some global warming now irreversible." SFGate. Jan. 27, 2009.http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2009/01/27/MNQP15H779.DTL
  • Modine, Austin. "Boffin dubs global warming 'irreversible'." The Register. Jan. 28, 2009.http://www.theregister.co.uk/2009/01/28/global_warming_irreversible/