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Geothermal energy backers expect rebirth
'Great to see growth ... It was dead for a long time," one scientist says
Cows may hold secret for efficient ethanol
Professor: Enzyme that helps digestion could be the key
Scientists develop solar cells with a twist
Cells are flexible enough to be rolled, transparent enough to tint windows
All-electric Smart car is unveiled
Daimler shows off battery-powered ED, will test 100 in Berlin
'Petit Le Mans' adds green competition
Cars are using gasohol, cellulosic ethanol or zero-sulfur diesel
4.2 million new 'green' jobs predicted
'Very compelling economic argument for investing,' Miami mayor says
Vatican sees the light of solar power
Audience hall provides location, and gets the benefits
Plug-in cars sparking a power shift
Studies show how drivers — and power grids — adjust to electric vehicles
More Green Machines news & features
Chrysler pegs 2010 as year of its electric car
What model will it be: A Dodge sports car, a Jeep or a Chrysler minivan?

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  Tech & Science  
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Image: Enceladus surface
NASA / JPL / SSI
Cosmic Log: Cassini's closest encounter
Science editor Alan Boyle's Weblog: The Cassini orbiter survives its closest-ever encounter with a Saturnian moon and sends back a fresh crop of pictures and data.

Video
  Sun-powered RV
Aug. 13: A Utah man has added solar to his RV. KSL's Keith McCord reports.

NBC News Channel

Video
  Hydrogen drive
Aug. 13: CNBC’s Phil LeBeau takes a look at Honda’s hydrogen-powered FCX Clarity.

CNBC

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Interactive
Hybrids: Sales of gas-electric models like the Prius will triple by the end of the decade. But high prices will keep them from going mainstream.
Hybrid payback?
Want to buy a hybrid, but concerned about the cost? Check out these models and comparisons.
Interactive
IMAGE: 2006 Honda Civic GX
Greenest and meanest vehicles
2007 vehicle models by their “green scores.”
Interactive
Slide show
  Green wheels
Take a look at some slightly unusual “green wheels.”

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