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Can enormous heat deep in the earth be harnessed to provide energy for us on the surface?
How green is an EV? A Union of Concerned Scientists report compares global warming emissions of plug-in vehicles to gasoline-powered cars.
SolarReserve hits a milestone on a 110-megawatt solar power plant that will have between 10 and 15 hours of energy storage in tanks of molten salt for supplying Nevada.
The activists' "Clean our Cloud" campaign may have stumbled, but Greenpeace raised good questions about big tech companies and their influence on local clean-power generation.
Targeting drivers of electric vehicles, the company will install ClipperCreek Level II chargers with solar option starting at $1,500.
Scientists say putting a price on climate-warming carbon dioxide generated by fossil fuels where it is burned may not be the most effective way to calculate carbon emissions' cost.
Underwear makers Triumph International and Wacoal have been recycling used brassieres to make industrial fuel.
Actor, presenter, geek and electric car fan Robert Llewellyn opens a series of columns on green tech with a rant about, er, calling it 'green tech'.
Denmark may have electric canal boats for the tourists, and wind turbines off its shore, but coal, gas, and oil still play a large part in how the country really produces electricity.
Google is bulking up its internal renewable-energy engineering team to advance R&D and make clean energy cheaper.