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optical
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Death of world's coral reefs could wreak global chaos
usatoday30.usatoday.com/news/world/environmen...10
Google to begin lowering rank for sites that receive DMCA notices
theverge.com/2012/8/10/3233625/google-search-...60
Gulf 'Dead Zone' Size In 2012 Is A Point Of Debate For Scientists
huffingtonpost.com/2012/06/22/gulf-dead-zone-...10