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  Obama will go to Copenhagen—if he can seal a deal 0 Posted 15 hours, 51 minutes ago

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• Just the Tip of the Bloomberg

  Mayor has big clean-energy goals for NYC 3

  Posted 1 year, 2 months ago

• If Only We Could Afford to Live There

  San Francisco gets even greener 15

  Posted 1 year, 8 months ago

• Buoy Meets World

  Utility PG&E agrees to buy electricity from future wave-power farm 5

  Posted 1 year, 10 months ago

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  Posted 2 years, 2 months ago

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  Underwater Update 1

  Posted 2 years, 3 months ago

• Getting Sloshed

  Umbra on wave power 4

  Posted 2 years, 3 months ago

• Tide Died

  Umbra on tidal power 2

  Posted 2 years, 3 months ago

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